CHICAGO ZOOLOGICAL SOCIETY: Form 990, tax year 2021

View the entire original 990 at ProPublica ↗

Organization: CHICAGO ZOOLOGICAL SOCIETY (EIN 36-2167016)
Tax period: 2021-04-01 to 2022-03-31
Filed: 2022-07-27
IRS object ID: 202212089349300001
Schema version: 2021v4.2
Source: Download XML · Original 990 at ProPublica

Every field in the e-filed return. Faint text is the IRS element name, for citing.

Return header
Form 990
Schedule A
Schedule B
Schedule C
Schedule D
Schedule F
Schedule G
Schedule I
Schedule J
Schedule K
Schedule L
Schedule M
Schedule O

Return header ReturnHeader

Field	Value	IRS element (for citing)
Return	2022-07-27T06:46:35-00:00	ReturnTs
Tax Period End	2022-03-31	TaxPeriodEndDt

Preparer Firm PreparerFirmGrp

Field	Value	IRS element (for citing)
Preparer Firm EIN	381357951	PreparerFirmEIN

Preparer Firm Name PreparerFirmName

Field	Value	IRS element (for citing)
Business Name Line1	Plante Moran PLLC	BusinessNameLine1Txt

Preparer US Address PreparerUSAddress

Field	Value	IRS element (for citing)
Address Line1	10 South Riverside Plaza 9th Floor	AddressLine1Txt
City	Chicago	CityNm
State Abbreviation	IL	StateAbbreviationCd
ZIP	60606	ZIPCd

Field	Value	IRS element (for citing)
Return Type	990	ReturnTypeCd
Tax Period Begin	2021-04-01	TaxPeriodBeginDt

Filer Filer

Field	Value	IRS element (for citing)
EIN	362167016	EIN

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	Chicago Zoological Society	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Business Name Control	CHIC	BusinessNameControlTxt
Phone	7086888300	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	3300 Golf Road	AddressLine1Txt
City	Brookfield	CityNm
State Abbreviation	IL	StateAbbreviationCd
ZIP	60513	ZIPCd

Business Officer BusinessOfficerGrp

Field	Value	IRS element (for citing)
Person	Michael J Adkesson	PersonNm
Person Title	President and CEO	PersonTitleTxt
Phone	7086888300	PhoneNum
Signature	2022-07-11	SignatureDt
Discuss With Paid Preparer	Yes (true)	DiscussWithPaidPreparerInd

Signing Officer SigningOfficerGrp

Person Full Name PersonFullName

Field	Value	IRS element (for citing)
Person First	Michael	PersonFirstNm
Person Last	Adkesson	PersonLastNm

Field	Value	IRS element (for citing)
SSN	999009999	SSN

Preparer Person PreparerPersonGrp

Field	Value	IRS element (for citing)
Preparer Person	LuAnn Trapp	PreparerPersonNm
PTIN	P01506476	PTIN
Phone	3122071040	PhoneNum

Additional Filer Information AdditionalFilerInformation

Trusted Customer TrustedCustomerGrp

Field	Value	IRS element (for citing)
Authentication Assurance Level	AAL1	AuthenticationAssuranceLevelCd
Identity Assurance Level	IAL1	IdentityAssuranceLevelCd

Field	Value	IRS element (for citing)
Tax	2021	TaxYr
Build TS	2022-09-23 18:48:47Z	BuildTS

Form 990 IRS990

Doing Business As Name DoingBusinessAsName

Field	Value	IRS element (for citing)
Business Name Line1	Brookfield Zoo	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Principal Officer	Michael J Adkesson	PrincipalOfficerNm

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	3300 Golf Road	AddressLine1Txt
City	Brookfield	CityNm
State Abbreviation	IL	StateAbbreviationCd
ZIP	60513	ZIPCd

Field	Value	IRS element (for citing)
Gross Receipts	$88,964,941	GrossReceiptsAmt
Group Return For Affiliates	false	GroupReturnForAffiliatesInd
Organization501c3	Yes (X)	Organization501c3Ind
Website Address	www.czs.org	WebsiteAddressTxt
Type Of Organization Corp	Yes (X)	TypeOfOrganizationCorpInd
Formation	1921	FormationYr
Legal Domicile State	IL	LegalDomicileStateCd
Activity Or Mission	To inspire conservation leadership by connecting people with wildlife and nature.	ActivityOrMissionDesc
Voting Members Governing Body	43	VotingMembersGoverningBodyCnt
Voting Members Independent	41	VotingMembersIndependentCnt
Total Employee	644	TotalEmployeeCnt
Total Volunteers	384	TotalVolunteersCnt
Total Gross UBI	$65,214	TotalGrossUBIAmt
PY Contributions Grants	$5,759,433	PYContributionsGrantsAmt
CY Contributions Grants	$44,579,942	CYContributionsGrantsAmt
PY Program Service Revenue	$1,403,748	PYProgramServiceRevenueAmt
CY Program Service Revenue	$34,196,282	CYProgramServiceRevenueAmt
PY Investment Income	$689,864	PYInvestmentIncomeAmt
CY Investment Income	$3,467,136	CYInvestmentIncomeAmt
PY Other Revenue	$14,125	PYOtherRevenueAmt
CY Other Revenue	-$24,050	CYOtherRevenueAmt
PY Total Revenue	$7,867,170	PYTotalRevenueAmt
CY Total Revenue	$82,219,310	CYTotalRevenueAmt
PY Grants And Similar Paid	$3,625	PYGrantsAndSimilarPaidAmt
CY Grants And Similar Paid	$531,126	CYGrantsAndSimilarPaidAmt
CY Benefits Paid To Members	$0	CYBenefitsPaidToMembersAmt
PY Salaries Comp Emp Bnft Paid	$7,027,522	PYSalariesCompEmpBnftPaidAmt
CY Salaries Comp Emp Bnft Paid	$32,679,060	CYSalariesCompEmpBnftPaidAmt
CY Total Prof Fndrsng Expns	$53,460	CYTotalProfFndrsngExpnsAmt
CY Total Fundraising Expense	$3,065,794	CYTotalFundraisingExpenseAmt
PY Other Expenses	$5,761,688	PYOtherExpensesAmt
CY Other Expenses	$27,439,563	CYOtherExpensesAmt
PY Total Expenses	$12,792,835	PYTotalExpensesAmt
CY Total Expenses	$60,703,209	CYTotalExpensesAmt
PY Revenues Less Expenses	-$4,925,665	PYRevenuesLessExpensesAmt
CY Revenues Less Expenses	$21,516,101	CYRevenuesLessExpensesAmt
Total Assets BOY	$213,737,000	TotalAssetsBOYAmt
Total Assets EOY	$234,132,000	TotalAssetsEOYAmt
Total Liabilities BOY	$52,945,000	TotalLiabilitiesBOYAmt
Total Liabilities EOY	$54,781,000	TotalLiabilitiesEOYAmt
Net Assets Or Fund Balances BOY	$160,792,000	NetAssetsOrFundBalancesBOYAmt
Net Assets Or Fund Balances EOY	$179,351,000	NetAssetsOrFundBalancesEOYAmt
Mission	To inspire conservation leadership by connecting people with wildlife and nature.	MissionDesc
Significant New Program Srvc	false	SignificantNewProgramSrvcInd
Significant Change	false	SignificantChangeInd
Expense	$21,952,976	ExpenseAmt
Grant	$350,000	GrantAmt
Revenue	$25,261,629	RevenueAmt
Desc	Park Operations The CZS maintains 75 buildings on 214 acres of land to exhibit over 2,500 animals. In a typical year, two million visitors annually enjoy the experience of seeing and learning about the animals of the world. Each individual that enters through Brookfield Zoos gates represents an opportunity to introduce representatives of the wild world, to convey our intertwined connections to the animal kingdom, and to encourage positive change in the world. The Zoo is open every day of the year. Admission is free to the general public 52 days/year and at all times to Illinois school groups and military personnel. The membership team services our 111,000 member households, providing them with the opportunity to participate in the conservation and educational efforts of CZS. The events team provides seasonal and animal themed events such as Earth Day Party, Ape Awareness Weekend, Holiday Magic and Boo at the Zoo. Visitor services provides narrated tram tours and accessible transportation options in the park.	Desc

Prog Srvc Accom Acty2 ProgSrvcAccomActy2Grp

Field	Value	IRS element (for citing)
Expense	$21,150,000	ExpenseAmt
Grant	$23,000	GrantAmt
Revenue	$1,983,989	RevenueAmt
Desc	Center for Science and Animal Well-Being CSAW More than 2500 ambassadors of the animal kingdom provide our visitors with a rare opportunity to see species from around the globe and experience up close, personal encounters with some. Expert care of these ambassadors is a time-honored tradition at CZS, where innovations in husbandry techniques and pioneering breeding programs are part of the cuttting edge culture of excellence. CSAW staff integrate disciplines such as population biology, behavioral science, nutrition and veterinary science to determine the best ways to provide and continuously care for the animals. They also incorporate models and practices from around the world, and from an array of animal care professionals, to develop the best possible zoo-based animal care and management practices. Through Keeper Chats and Ambassador Animal Encounters, CSAW staff share their knowledge of the animals in their care with zoo guests, helping them gain an appreciation for all citizens of the natural world.	Desc

Prog Srvc Accom Acty3 ProgSrvcAccomActy3Grp

Field	Value	IRS element (for citing)
Expense	$5,209,000	ExpenseAmt
Grant	$158,126	GrantAmt
Revenue	$195,127	RevenueAmt
Desc	Center for Conservation Leadership CCL Through its many conservation and education programs, CZS communicates with others to engender in them a sense of ownership about living harmoniously with nature and helping save endangered species. Education specialists, volunteers, curators, graphic and exhibit designers, photographers and many others contribute to sharing this information both in person and virtually. As well as reaching the daily visitors to the Zoo, CZS engages would be conservationists outside of the Zoo including classrooms of school children, teachers and community leaders. Additionally through field programs, CZS supports efforts to protect and restore populations of threatened species in other parts of the world. The CCL strengthens the bridge between education and conservation, between field research and the animals in our care.	Desc

Field	Value	IRS element (for citing)
Total Program Service Expenses	$48,311,976	TotalProgramServiceExpensesAmt
Described In Section501c3	Yes (true)	DescribedInSection501c3Ind
Schedule B Required	Yes (true)	ScheduleBRequiredInd
Political Campaign Acty	false	PoliticalCampaignActyInd
Lobbying Activities	Yes (true)	LobbyingActivitiesInd
Subject To Proxy Tax	false	SubjectToProxyTaxInd
Donor Advised Fund	Yes (true)	DonorAdvisedFundInd
Conservation Easements	false	ConservationEasementsInd
Collections Of Art	Yes (true)	CollectionsOfArtInd
Credit Counseling	false	CreditCounselingInd
Donor Rstr Or Quasi Endowments	Yes (true)	DonorRstrOrQuasiEndowmentsInd
Report Land Building Equipment	Yes (true)	ReportLandBuildingEquipmentInd
Report Investments Other Sec	false	ReportInvestmentsOtherSecInd
Report Program Related Invst	false	ReportProgramRelatedInvstInd
Report Other Assets	false	ReportOtherAssetsInd
Report Other Liabilities	Yes (true)	ReportOtherLiabilitiesInd
Include FIN48 Footnote	false	IncludeFIN48FootnoteInd
Independent Audit Fincl Stmt	Yes (true)	IndependentAuditFinclStmtInd
Consolidated Audit Fincl Stmt	Yes (true)	ConsolidatedAuditFinclStmtInd
School Operating	false	SchoolOperatingInd
Foreign Office	false	ForeignOfficeInd
Foreign Activities	Yes (true)	ForeignActivitiesInd
More Than5000 K To Org	Yes (true)	MoreThan5000KToOrgInd
More Than5000 K To Individuals	false	MoreThan5000KToIndividualsInd
Professional Fundraising	Yes (true)	ProfessionalFundraisingInd
Fundraising Activities	Yes (true)	FundraisingActivitiesInd
Gaming Activities	false	GamingActivitiesInd
Operate Hospital	false	OperateHospitalInd
Grants To Organizations	Yes (true)	GrantsToOrganizationsInd
Grants To Individuals	Yes (true)	GrantsToIndividualsInd
Schedule J Required	Yes (true)	ScheduleJRequiredInd
Tax Exempt Bonds	Yes (true)	TaxExemptBondsInd
Invest Tax Exempt Bonds	false	InvestTaxExemptBondsInd
Escrow Account	false	EscrowAccountInd
On Behalf Of Issuer	false	OnBehalfOfIssuerInd
Engaged In Excess Benefit Trans	false	EngagedInExcessBenefitTransInd
PY Excess Benefit Trans	false	PYExcessBenefitTransInd
Loan Outstanding	false	LoanOutstandingInd
Grant To Related Person	false	GrantToRelatedPersonInd
Business Rln With Org Mem	false	BusinessRlnWithOrgMemInd
Business Rln With Fam Mem	Yes (true)	BusinessRlnWithFamMemInd
Business Rln With35 Ctrl Ent	Yes (true)	BusinessRlnWith35CtrlEntInd
Deductible Non Cash Contri	Yes (true)	DeductibleNonCashContriInd
Deductible Art Contribution	Yes (true)	DeductibleArtContributionInd
Terminate Operations	false	TerminateOperationsInd
Partial Liquidation	false	PartialLiquidationInd
Disregarded Entity	false	DisregardedEntityInd
Related Entity	false	RelatedEntityInd
Related Organization Ctrl Ent	false	RelatedOrganizationCtrlEntInd
Trnsfr Exmpt Non Chrtbl Rltd Org	false	TrnsfrExmptNonChrtblRltdOrgInd
Activities Conducted Prtshp	false	ActivitiesConductedPrtshpInd
Schedule O Required	Yes (true)	ScheduleORequiredInd
Info In Schedule O Part V	Yes (X)	InfoInScheduleOPartVInd
IRP Document	79	IRPDocumentCnt
IRP Document W2 G	0	IRPDocumentW2GCnt
Backup Wthld Compliance	Yes (true)	BackupWthldComplianceInd
Employee	644	EmployeeCnt
Employment Tax Returns Filed	Yes (true)	EmploymentTaxReturnsFiledInd
Unrelated Bus Incm Over Limit	Yes (true)	UnrelatedBusIncmOverLimitInd
Form990 T Filed	Yes (true)	Form990TFiledInd
Foreign Financial Account	false	ForeignFinancialAccountInd
Prohibited Tax Shelter Trans	false	ProhibitedTaxShelterTransInd
Taxable Party Notification	false	TaxablePartyNotificationInd
Nondeductible Contributions	false	NondeductibleContributionsInd
Quid Pro Quo Contributions	Yes (true)	QuidProQuoContributionsInd
Quid Pro Quo Contri Discl	Yes (true)	QuidProQuoContriDisclInd
Form8282 Property Disposed Of	false	Form8282PropertyDisposedOfInd
Rcv Fnds To Pay Prsnl Bnft Cntrct	false	RcvFndsToPayPrsnlBnftCntrctInd
Pay Premiums Prsnl Bnft Cntrct	false	PayPremiumsPrsnlBnftCntrctInd
Indoor Tanning Services	false	IndoorTanningServicesInd
Subj To Tax Rmnrtn Ex Prcht Pymt	false	SubjToTaxRmnrtnExPrchtPymtInd
Subject To Excs Tax Net Invst Inc	false	SubjectToExcsTaxNetInvstIncInd
Info In Schedule O Part VI	Yes (X)	InfoInScheduleOPartVIInd
Governing Body Voting Members	43	GoverningBodyVotingMembersCnt
Independent Voting Member	41	IndependentVotingMemberCnt
Family Or Business Rln	Yes (true)	FamilyOrBusinessRlnInd
Delegation Of Mgmt Duties	Yes (true)	DelegationOfMgmtDutiesInd
Change To Org Documents	false	ChangeToOrgDocumentsInd
Material Diversion Or Misuse	false	MaterialDiversionOrMisuseInd
Members Or Stockholders	Yes (true)	MembersOrStockholdersInd
Election Of Board Members	Yes (true)	ElectionOfBoardMembersInd
Decisions Subject To Approva	false	DecisionsSubjectToApprovaInd
Minutes Of Governing Body	Yes (true)	MinutesOfGoverningBodyInd
Minutes Of Committees	Yes (true)	MinutesOfCommitteesInd
Officer Mailing Address	false	OfficerMailingAddressInd
Local Chapters	false	LocalChaptersInd
Form990 Provided To Gvrn Body	false	Form990ProvidedToGvrnBodyInd
Conflict Of Interest Policy	Yes (true)	ConflictOfInterestPolicyInd
Annual Disclosure Covered Prsn	Yes (true)	AnnualDisclosureCoveredPrsnInd
Regular Monitoring Enfrc	Yes (true)	RegularMonitoringEnfrcInd
Whistleblower Policy	Yes (true)	WhistleblowerPolicyInd
Document Retention Policy	Yes (true)	DocumentRetentionPolicyInd
Compensation Process CEO	Yes (true)	CompensationProcessCEOInd
Compensation Process Other	Yes (true)	CompensationProcessOtherInd
Investment In Joint Venture	false	InvestmentInJointVentureInd
States Where Copy Of Return Is Fld	FL	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	IL	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	WI	StatesWhereCopyOfReturnIsFldCd
Upon Request	Yes (X)	UponRequestInd

Books In Care Of Detail BooksInCareOfDetail

Field	Value	IRS element (for citing)
Person	David E Burns	PersonNm
Phone	7086888387	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	3300 Golf Road	AddressLine1Txt
City	Brookfield	CityNm
State Abbreviation	IL	StateAbbreviationCd
ZIP	60513	ZIPCd

Form990 Part VII Section A Form990PartVIISectionAGrp (57 entries)

TitleTitleTxt	Average Hours Per WeekAverageHoursPerWeekRt	Individual Trustee Or DirectorIndividualTrusteeOrDirectorInd	OfficerOfficerInd	Reportable Comp From OrgReportableCompFromOrgAmt	Reportable Comp From Rltd OrgReportableCompFromRltdOrgAmt	Other CompensationOtherCompensationAmt	Key EmployeeKeyEmployeeInd	Highest Compensated EmployeeHighestCompensatedEmployeeInd
Stuart D Strahl PhD
President and CEO through 11/21 Trustee	040.00	Yes (X)	Yes (X)	$783,394	$0	$32,267
Cynthia W Zeigler
Chief Advancement Officer through 12/21	040.00			$505,097	$0	$16,390	Yes (X)
David E Burns
Chief Financial and Admin. Officer	040.00			$387,442	$0	$30,554	Yes (X)
Dr Michael Adkesson
President and CEO as of 10/21	040.00	Yes (X)	Yes (X)	$238,951	$0	$39,564
Frank W Zeigler
Sr. VP Animal Programs	040.00			$245,391	$0	$14,992	Yes (X)
Sarah Breen-Bartecki
Sr. VP Conserv Pgms, ResearchFunding	040.00			$242,957	$0	$17,328	Yes (X)
Leah Rippe
VP Marketing Communications	040.00			$189,300	$0	$29,281		Yes (X)
Mary A Cronin
Master Planning Coordinator	020.00			$200,000	$0	$6,000		Yes (X)
Sandra L Dornhecker
Sr. VP Human Resources	040.00			$174,956	$0	$26,152		Yes (X)
Michael Owens
VP Information Technology	040.00			$190,752	$0	$7,027		Yes (X)
Jerome E Johnston
VP Guest Services Operations	040.00			$179,000	$0	$11,243		Yes (X)
Cherryl T Thomas
Vice-Chair through 7/21Chair of the Board as of 7/21	002.00	Yes (X)	Yes (X)	$0	$0	$0
John P Grube
Chair of the Board through 7/21 Vice-Chair as of 7/21	002.00	Yes (X)	Yes (X)	$0	$0	$0
Fred A Krehbiel
Honorary Chair through 6/21	002.00	Yes (X)	Yes (X)	$0	$0	$0
William C Kunkler III
Deputy Chair of the Board	002.00	Yes (X)	Yes (X)	$0	$0	$0
Elizabeth Hamill Bramsen
Vice-Chair of the Board	002.00	Yes (X)	Yes (X)	$0	$0	$0
Merrick M Elfman
Vice-Chair of the Board	002.00	Yes (X)	Yes (X)	$0	$0	$0
Bert A Getz Jr
Vice-Chair of the Board	002.00	Yes (X)	Yes (X)	$0	$0	$0
Kelley C Schueler
Vice-Chair of the Board	002.00	Yes (X)	Yes (X)	$0	$0	$0
Kathryn Babcock Shaffer
Vice-Chair of the Board	002.00	Yes (X)	Yes (X)	$0	$0	$0
Michael P Emmert
Treasurer	002.00	Yes (X)	Yes (X)	$0	$0	$0
Randall G Vickery
Secretary	002.00	Yes (X)	Yes (X)	$0	$0	$0
Stuart B Abelson
Trustee	002.00	Yes (X)		$0	$0	$0
George Barr
Trustee	002.00	Yes (X)		$0	$0	$0
Walter W Becky II
Trustee	002.00	Yes (X)		$0	$0	$0
Jay D Bergman
Trustee	002.00	Yes (X)		$0	$0	$0
Edward McCormick Blair Jr
Trustee	002.00	Yes (X)		$0	$0	$0
Barbara J Bradford
Trustee	002.00	Yes (X)		$0	$0	$0
James A Bryan
Trustee	002.00	Yes (X)		$0	$0	$0
Michael G Canning
Trustee	002.00	Yes (X)		$0	$0	$0
Kevin M Carmody
Trustee through 9/21	002.00	Yes (X)		$0	$0	$0
John A Carpenter
Trustee	002.00	Yes (X)		$0	$0	$0
Dr Bonny Chen
Trustee	002.00	Yes (X)		$0	$0	$0
Rita Sola Cook
Trustee	002.00	Yes (X)		$0	$0	$0
JR Davis III
Trustee	002.00	Yes (X)		$0	$0	$0
Michael F DeSantiago
Trustee	002.00	Yes (X)		$0	$0	$0
Gregory J DiDomenico
Trustee	002.00	Yes (X)		$0	$0	$0
Arthur J Fogel
Trustee through 3/22	002.00	Yes (X)		$0	$0	$0
Sasha L Gerritson
Trustee	002.00	Yes (X)		$0	$0	$0
Darius A Gill
Trustee as of 3/22	002.00	Yes (X)		$0	$0	$0
Veronica Gomez
Trustee	002.00	Yes (X)		$0	$0	$0
Barbara Grayson
Trustee	002.00	Yes (X)		$0	$0	$0
Joseph A Gregoire
Trustee	002.00	Yes (X)		$0	$0	$0
Steve Groetsema
Trustee	002.00	Yes (X)		$0	$0	$0
Heidi Huizenga
Trustee	002.00	Yes (X)		$0	$0	$0
Kevin M Keeley
Trustee	002.00	Yes (X)		$0	$0	$0
Molly Keller
Trustee	002.00	Yes (X)		$0	$0	$0
Kevin M Killips
Trustee	002.00	Yes (X)		$0	$0	$0
Barbara Levy Kipper
Trustee	002.00	Yes (X)		$0	$0	$0
Jerry Manne
Trustee	002.00	Yes (X)		$0	$0	$0
Toni Preckwinkle
Trustee	002.00	Yes (X)		$0	$0	$0
Benita S Romano
Trustee	002.00	Yes (X)		$0	$0	$0
Mark G Sander
Trustee	002.00	Yes (X)		$0	$0	$0
Ted Staszak
Trustee through 5/21	002.00	Yes (X)		$0	$0	$0
Kristi Weaver
Trustee as of 3/22	002.00	Yes (X)		$0	$0	$0
Patrick E Whiteside
Trustee	002.00	Yes (X)		$0	$0	$0
Ryan P Williamson
Trustee through 5/21	002.00	Yes (X)		$0	$0	$0

Field	Value	IRS element (for citing)
Total Reportable Comp From Org	$3,337,240	TotalReportableCompFromOrgAmt
Total Other Compensation	$230,798	TotalOtherCompensationAmt
Indiv Rcvd Greater Than100 K	33	IndivRcvdGreaterThan100KCnt
Former Ofcr Employees Listed	false	FormerOfcrEmployeesListedInd
Total Comp Greater Than150 K	Yes (true)	TotalCompGreaterThan150KInd
Compensation From Other Srcs	false	CompensationFromOtherSrcsInd

Contractor Compensation ContractorCompensationGrp (5 entries)

Address Line1ContractorAddress/USAddress/AddressLine1Txt	CityContractorAddress/USAddress/CityNm	State AbbreviationContractorAddress/USAddress/StateAbbreviationCd	ZIPContractorAddress/USAddress/ZIPCd	ServicesServicesDesc	CompensationCompensationAmt
Two by Four
10 N Dearborn St Suite 1000	Chicago	IL	60602	Advertising	$1,135,331
Chilton Yambert Porter LLP
303 W Madison Suite 2300	Chicago	IL	60606	Legal Services	$613,035
University of Illinois
506 S Wright St	Urbana	IL	61802	Veterinary/Pathology/Lab Services	$508,626
Paymentech LLC
14221 Dalas Parkway	Dallas	TX	75254	Payment Card Processing Services	$489,388
The Northern Trust Company
50 S LaSalle Street	Chicago	IL	60603	Banking and Investment Services	$347,564

Field	Value	IRS element (for citing)
Cntrct Rcvd Greater Than100 K	24	CntrctRcvdGreaterThan100KCnt
Fundraising	$1,510,639	FundraisingAmt
Government Grants	$30,093,378	GovernmentGrantsAmt
All Other Contributions	$12,975,925	AllOtherContributionsAmt
Noncash Contributions	$2,595,343	NoncashContributionsAmt
Total Contributions	$44,579,942	TotalContributionsAmt

Program Service Revenue ProgramServiceRevenueGrp (5 entries)

DescDesc	BusinessBusinessCd	Total Revenue ColumnTotalRevenueColumnAmt	Related Or Exempt Func IncomeRelatedOrExemptFuncIncomeAmt	ExclusionExclusionAmt
General Admissions	900099	$8,232,485	$8,232,485
Memberships	900099	$15,025,888	$15,025,888
Visitor Services	900099	$5,208,153	$1,200,446	$4,007,707
Admissions-Internal Attractions	900099	$1,783,863	$1,783,863
Visitor Parking	900099	$2,481,531		$2,481,531

Total Oth Program Service Rev TotalOthProgramServiceRevGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$1,464,362	TotalRevenueColumnAmt
Related Or Exempt Func Income	$1,132,849	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$65,214	UnrelatedBusinessRevenueAmt
Exclusion	$266,299	ExclusionAmt

Field	Value	IRS element (for citing)
Total Program Service Revenue	$34,196,282	TotalProgramServiceRevenueAmt

Investment Income InvestmentIncomeGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$959,525	TotalRevenueColumnAmt
Exclusion	$959,525	ExclusionAmt

Gross Rents GrossRentsGrp

Field	Value	IRS element (for citing)
Real	$60,700	RealAmt

Rental Income Or Loss RentalIncomeOrLossGrp

Field	Value	IRS element (for citing)
Real	$60,700	RealAmt

Net Rental Income Or Loss NetRentalIncomeOrLossGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$60,700	TotalRevenueColumnAmt
Exclusion	$60,700	ExclusionAmt

Gross Amount Sales Assets GrossAmountSalesAssetsGrp

Field	Value	IRS element (for citing)
Securities	$8,940,142	SecuritiesAmt

Less Cost Oth Basis Sales Expnss LessCostOthBasisSalesExpnssGrp

Field	Value	IRS element (for citing)
Securities	$6,432,531	SecuritiesAmt

Gain Or Loss GainOrLossGrp

Field	Value	IRS element (for citing)
Securities	$2,507,611	SecuritiesAmt

Net Gain Or Loss Investments NetGainOrLossInvestmentsGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$2,507,611	TotalRevenueColumnAmt
Exclusion	$2,507,611	ExclusionAmt

Field	Value	IRS element (for citing)
Fundraising Gross Income	$228,350	FundraisingGrossIncomeAmt
Contri Rpt Fundraising Event	$1,510,639	ContriRptFundraisingEventAmt
Fundraising Direct Expenses	$313,100	FundraisingDirectExpensesAmt

Net Incm From Fundraising Evt NetIncmFromFundraisingEvtGrp

Field	Value	IRS element (for citing)
Total Revenue Column	-$84,750	TotalRevenueColumnAmt
Exclusion	-$84,750	ExclusionAmt

Total Revenue TotalRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$82,219,310	TotalRevenueColumnAmt
Related Or Exempt Func Income	$27,375,531	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$65,214	UnrelatedBusinessRevenueAmt
Exclusion	$10,198,623	ExclusionAmt

Grants To Domestic Orgs GrantsToDomesticOrgsGrp

Field	Value	IRS element (for citing)
Total	$367,200	TotalAmt
Program Services	$367,200	ProgramServicesAmt

Grants To Domestic Individuals GrantsToDomesticIndividualsGrp

Field	Value	IRS element (for citing)
Total	$25,000	TotalAmt
Program Services	$25,000	ProgramServicesAmt

Foreign Grants ForeignGrantsGrp

Field	Value	IRS element (for citing)
Total	$138,926	TotalAmt
Program Services	$138,926	ProgramServicesAmt

Benefits To Members BenefitsToMembersGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Comp Current Ofcr Directors CompCurrentOfcrDirectorsGrp

Field	Value	IRS element (for citing)
Total	$2,571,371	TotalAmt
Program Services	$1,104,253	ProgramServicesAmt
Management And General	$523,097	ManagementAndGeneralAmt
Fundraising	$944,021	FundraisingAmt

Comp Disqual Persons CompDisqualPersonsGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Other Salaries And Wages OtherSalariesAndWagesGrp

Field	Value	IRS element (for citing)
Total	$23,270,540	TotalAmt
Program Services	$18,906,485	ProgramServicesAmt
Management And General	$3,107,370	ManagementAndGeneralAmt
Fundraising	$1,256,685	FundraisingAmt

Pension Plan Contributions PensionPlanContributionsGrp

Field	Value	IRS element (for citing)
Total	$528,575	TotalAmt
Program Services	$412,657	ProgramServicesAmt
Management And General	$87,387	ManagementAndGeneralAmt
Fundraising	$28,531	FundraisingAmt

Other Employee Benefits OtherEmployeeBenefitsGrp

Field	Value	IRS element (for citing)
Total	$4,488,641	TotalAmt
Program Services	$3,504,263	ProgramServicesAmt
Management And General	$742,089	ManagementAndGeneralAmt
Fundraising	$242,289	FundraisingAmt

Payroll Taxes PayrollTaxesGrp

Field	Value	IRS element (for citing)
Total	$1,819,933	TotalAmt
Program Services	$1,420,815	ProgramServicesAmt
Management And General	$300,882	ManagementAndGeneralAmt
Fundraising	$98,236	FundraisingAmt

Fees For Services Management FeesForServicesManagementGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Fees For Services Legal FeesForServicesLegalGrp

Field	Value	IRS element (for citing)
Total	$583,846	TotalAmt
Management And General	$583,846	ManagementAndGeneralAmt

Fees For Services Accounting FeesForServicesAccountingGrp

Field	Value	IRS element (for citing)
Total	$96,075	TotalAmt
Management And General	$96,075	ManagementAndGeneralAmt

Fees For Services Lobbying FeesForServicesLobbyingGrp

Field	Value	IRS element (for citing)
Total	$52,157	TotalAmt
Management And General	$52,157	ManagementAndGeneralAmt

Fees For Services Prof Fundraising FeesForServicesProfFundraising

Field	Value	IRS element (for citing)
Total	$53,460	TotalAmt
Fundraising	$53,460	FundraisingAmt

Fees For Srvc Invst Mgmnt Fees FeesForSrvcInvstMgmntFeesGrp

Field	Value	IRS element (for citing)
Total	$146,501	TotalAmt
Management And General	$146,501	ManagementAndGeneralAmt

Fees For Services Other FeesForServicesOtherGrp

Field	Value	IRS element (for citing)
Total	$4,466,346	TotalAmt
Program Services	$4,083,902	ProgramServicesAmt
Management And General	$266,373	ManagementAndGeneralAmt
Fundraising	$116,071	FundraisingAmt

Advertising AdvertisingGrp

Field	Value	IRS element (for citing)
Total	$1,850,465	TotalAmt
Management And General	$1,850,465	ManagementAndGeneralAmt

Office Expenses OfficeExpensesGrp

Field	Value	IRS element (for citing)
Total	$4,711,262	TotalAmt
Program Services	$4,308,046	ProgramServicesAmt
Management And General	$267,240	ManagementAndGeneralAmt
Fundraising	$135,976	FundraisingAmt

Information Technology InformationTechnologyGrp

Field	Value	IRS element (for citing)
Total	$1,072,236	TotalAmt
Program Services	$429,111	ProgramServicesAmt
Management And General	$567,345	ManagementAndGeneralAmt
Fundraising	$75,780	FundraisingAmt

Royalties RoyaltiesGrp

Field	Value	IRS element (for citing)
Total	$32,228	TotalAmt
Program Services	$32,228	ProgramServicesAmt

Occupancy OccupancyGrp

Field	Value	IRS element (for citing)
Total	$2,356,075	TotalAmt
Program Services	$2,341,092	ProgramServicesAmt
Management And General	$11,657	ManagementAndGeneralAmt
Fundraising	$3,326	FundraisingAmt

Travel TravelGrp

Field	Value	IRS element (for citing)
Total	$24,398	TotalAmt
Program Services	$11,065	ProgramServicesAmt
Management And General	$13,311	ManagementAndGeneralAmt
Fundraising	$22	FundraisingAmt

Pymt Travel Entrtnmnt Pub Ofcl PymtTravelEntrtnmntPubOfclGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Conferences Meetings ConferencesMeetingsGrp

Field	Value	IRS element (for citing)
Total	$175,611	TotalAmt
Program Services	$33,644	ProgramServicesAmt
Management And General	$95,328	ManagementAndGeneralAmt
Fundraising	$46,639	FundraisingAmt

Interest InterestGrp

Field	Value	IRS element (for citing)
Total	$217,975	TotalAmt
Program Services	$217,975	ProgramServicesAmt

Payments To Affiliates PaymentsToAffiliatesGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Depreciation Depletion DepreciationDepletionGrp

Field	Value	IRS element (for citing)
Total	$8,670,633	TotalAmt
Program Services	$8,181,695	ProgramServicesAmt
Management And General	$446,292	ManagementAndGeneralAmt
Fundraising	$42,645	FundraisingAmt

Insurance InsuranceGrp

Field	Value	IRS element (for citing)
Total	$1,189,888	TotalAmt
Program Services	$1,085,892	ProgramServicesAmt
Management And General	$82,340	ManagementAndGeneralAmt
Fundraising	$21,656	FundraisingAmt

Other Expenses OtherExpensesGrp (3 entries)

DescDesc	TotalTotalAmt	Program ServicesProgramServicesAmt
Animal food and transport	$1,221,084	$1,221,084
Revenue Bond Maintenance Fees	$275,592	$275,592
Gain/Loss on Retirement of Fixed Assets	$3,224	$3,224

All Other Expenses AllOtherExpensesGrp

Field	Value	IRS element (for citing)
Total	$293,967	TotalAmt
Program Services	$207,827	ProgramServicesAmt
Management And General	$85,683	ManagementAndGeneralAmt
Fundraising	$457	FundraisingAmt

Total Functional Expenses TotalFunctionalExpensesGrp

Field	Value	IRS element (for citing)
Total	$60,703,209	TotalAmt
Program Services	$48,311,976	ProgramServicesAmt
Management And General	$9,325,438	ManagementAndGeneralAmt
Fundraising	$3,065,794	FundraisingAmt

Cash Non Interest Bearing CashNonInterestBearingGrp

Field	Value	IRS element (for citing)
BOY	$881,784	BOYAmt
EOY	$600,702	EOYAmt

Savings And Temp Cash Invst SavingsAndTempCashInvstGrp

Field	Value	IRS element (for citing)
BOY	$30,255,424	BOYAmt
EOY	$54,907,829	EOYAmt

Pledges And Grants Receivable PledgesAndGrantsReceivableGrp

Field	Value	IRS element (for citing)
BOY	$3,961,573	BOYAmt
EOY	$7,519,172	EOYAmt

Accounts Receivable AccountsReceivableGrp

Field	Value	IRS element (for citing)
BOY	$488,355	BOYAmt
EOY	$267,568	EOYAmt

Prepaid Expenses Defrd Charges PrepaidExpensesDefrdChargesGrp

Field	Value	IRS element (for citing)
BOY	$1,596,717	BOYAmt
EOY	$1,960,760	EOYAmt

Field	Value	IRS element (for citing)
Land Bldg Equip Cost Or Other Bss	$289,586,865	LandBldgEquipCostOrOtherBssAmt
Land Bldg Equip Accum Deprec	$176,800,402	LandBldgEquipAccumDeprecAmt

Land Bldg Equip Basis Net LandBldgEquipBasisNetGrp

Field	Value	IRS element (for citing)
BOY	$118,928,456	BOYAmt
EOY	$112,786,463	EOYAmt

Investments Pub Traded Sec InvestmentsPubTradedSecGrp

Field	Value	IRS element (for citing)
BOY	$57,504,000	BOYAmt
EOY	$55,953,000	EOYAmt

Other Assets Total OtherAssetsTotalGrp

Field	Value	IRS element (for citing)
BOY	$120,691	BOYAmt
EOY	$136,506	EOYAmt

Total Assets TotalAssetsGrp

Field	Value	IRS element (for citing)
BOY	$213,737,000	BOYAmt
EOY	$234,132,000	EOYAmt

Accounts Payable Accr Expnss AccountsPayableAccrExpnssGrp

Field	Value	IRS element (for citing)
BOY	$4,633,276	BOYAmt
EOY	$5,743,221	EOYAmt

Deferred Revenue DeferredRevenueGrp

Field	Value	IRS element (for citing)
BOY	$14,988,739	BOYAmt
EOY	$17,167,996	EOYAmt

Tax Exempt Bond Liabilities TaxExemptBondLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$29,975,000	BOYAmt
EOY	$29,440,000	EOYAmt

Other Liabilities OtherLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$3,347,985	BOYAmt
EOY	$2,429,783	EOYAmt

Total Liabilities TotalLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$52,945,000	BOYAmt
EOY	$54,781,000	EOYAmt

Field	Value	IRS element (for citing)
Organization Follows FASB117	Yes (X)	OrganizationFollowsFASB117Ind

No Donor Restriction Net Assets NoDonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
BOY	$136,076,000	BOYAmt
EOY	$154,565,000	EOYAmt

Donor Restriction Net Assets DonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
BOY	$24,716,000	BOYAmt
EOY	$24,786,000	EOYAmt

Total Net Assets Fund Balance TotalNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$160,792,000	BOYAmt
EOY	$179,351,000	EOYAmt

Tot Liab Net Assets Fund Balance TotLiabNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$213,737,000	BOYAmt
EOY	$234,132,000	EOYAmt

Field	Value	IRS element (for citing)
Info In Schedule O Part XI	Yes (X)	InfoInScheduleOPartXIInd
Reconcilation Revenue Expnss	$21,516,101	ReconcilationRevenueExpnssAmt
Net Unrlzd Gains Losses Invst	-$3,554,560	NetUnrlzdGainsLossesInvstAmt
Other Changes In Net Assets	$597,459	OtherChangesInNetAssetsAmt
Method Of Accounting Accrual	Yes (X)	MethodOfAccountingAccrualInd
Accountant Compile Or Review	false	AccountantCompileOrReviewInd
FS Audited	Yes (true)	FSAuditedInd

FS Audited Basis FSAuditedBasisGrp

Field	Value	IRS element (for citing)
Consol And Sep Basis Fincl Stmt	Yes (X)	ConsolAndSepBasisFinclStmtInd

Field	Value	IRS element (for citing)
Audit Committee	Yes (true)	AuditCommitteeInd
Federal Grant Audit Required	Yes (true)	FederalGrantAuditRequiredInd
Federal Grant Audit Performed	Yes (true)	FederalGrantAuditPerformedInd

Schedule A IRS990ScheduleA

Field	Value	IRS element (for citing)
Public Organization170	Yes (X)	PublicOrganization170Ind

Gifts Grants Contri Rcvd170 GiftsGrantsContriRcvd170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$21,190,270	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$23,367,263	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$23,516,558	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$1,851,264	CurrentTaxYearMinus1YearAmt
Current Tax Year	$29,624,590	CurrentTaxYearAmt
Total	$99,549,945	TotalAmt

Tax Rev Levied Orgnztnl Bnft170 TaxRevLeviedOrgnztnlBnft170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$15,178,033	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$14,573,917	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$14,677,126	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$3,908,169	CurrentTaxYearMinus1YearAmt
Current Tax Year	$14,955,352	CurrentTaxYearAmt
Total	$63,292,597	TotalAmt

Total Calendar Year170 TotalCalendarYear170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$36,368,303	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$37,941,180	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$38,193,684	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$5,759,433	CurrentTaxYearMinus1YearAmt
Current Tax Year	$44,579,942	CurrentTaxYearAmt
Total	$162,842,542	TotalAmt

Field	Value	IRS element (for citing)
Substantial Contributors Tot	$597,956	SubstantialContributorsTotAmt
Public Support Total170	$162,244,586	PublicSupportTotal170Amt

Gross Investment Income170 GrossInvestmentIncome170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$1,509,502	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$1,906,637	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$896,735	CurrentTaxYearMinus2YearsAmt
Current Tax Year	$1,020,225	CurrentTaxYearAmt
Total	$5,333,099	TotalAmt

Unrelated Business Net Incm170 UnrelatedBusinessNetIncm170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus3 Years	$29,847	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$40,865	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$9,196	CurrentTaxYearMinus1YearAmt
Total	$79,908	TotalAmt

Field	Value	IRS element (for citing)
Total Support	$168,255,549	TotalSupportAmt
Gross Receipts Rltd Activities	$119,636,481	GrossReceiptsRltdActivitiesAmt
Public Support CY170	0.96430	PublicSupportCY170Pct
Public Support PY170	0.93710	PublicSupportPY170Pct
Thirty Thr Pct Suprt Tests CY170	Yes (X)	ThirtyThrPctSuprtTestsCY170Ind
Facts And Circumstances Test	Part II Section A Line 1-4 The 2020 amounts reflect the short year period from 1/1/21-3/31/21 due a change in accounting period.	FactsAndCircumstancesTestTxt

Form990 Schedule A Part VI Form990ScheduleAPartVIGrp

Field	Value	IRS element (for citing)
Form And Line Reference	Part II Section B Line 7-10	FormAndLineReferenceDesc
Explanation	The 2020 amounts reflect the short year period from 1/1/21-3/31/21 due a change in accounting period.	ExplanationTxt

Schedule B IRS990ScheduleB

Contributor Information ContributorInformationGrp

Field	Value	IRS element (for citing)
Contributor	RESTRICTED	ContributorNum

Contributor Business Name ContributorBusinessName

Field	Value	IRS element (for citing)
Business Name Line1	RESTRICTED	BusinessNameLine1

Contributor US Address ContributorUSAddress

Field	Value	IRS element (for citing)
Address Line1	RESTRICTED	AddressLine1
Address Line2	RESTRICTED	AddressLine2
City	RESTRICTED	City
State	RESTRICTED	State
ZIP Code	RESTRICTED	ZIPCode

Field	Value	IRS element (for citing)
Total Contributions	RESTRICTED	TotalContributionsAmt

Schedule C IRS990ScheduleC

Field	Value	IRS element (for citing)
Volunteers	false	VolunteersInd
Paid Staff Or Management	Yes (true)	PaidStaffOrManagementInd
Media Advertisements	false	MediaAdvertisementsInd
Mailings Members	Yes (true)	MailingsMembersInd
Publications Or Broadcast	false	PublicationsOrBroadcastInd
Grants Other Organizations	Yes (true)	GrantsOtherOrganizationsInd
Grants Other Organizations	$350,000	GrantsOtherOrganizationsAmt
Direct Contact Legislators	Yes (true)	DirectContactLegislatorsInd
Direct Contact Legislators	$80,730	DirectContactLegislatorsAmt
Rallies Demonstrations	false	RalliesDemonstrationsInd
Other Activities	false	OtherActivitiesInd
Total Lobbying Expenditures	$430,730	TotalLobbyingExpendituresAmt
Not Described Section501c3	false	NotDescribedSection501c3Ind

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	II-B 1 A-J	FormAndLineReferenceDesc
Explanation	The Chicago Zoological Society is a private non profit organization that operates Brookfield Zoo on land owned by the Forest Preserve District of Cook County. Brookfield Zoo was created through an act of the Illinois Legislature and the Society annually receives partial funding from the Cook County Forest Preserves to maintain and operate the Zoo. Occasionally, the laws and regulations under which the Society was organized and is funded and operated require updating. The Society may advise and assist appropriate legislative bodies in this activity. It may also advocate the adoption or rejection of legislation. By virtue of a management agreement with the District, the Society is periodically called upon to advise on matters of public policy. The Society also employs certain staff and consultants to communicate with the State of Illinois, federal officials, county commissioners and other government officials, to inform those parties of the activities of the Society. Additionally, as required during the year, the Societys President and designated staff attend national and international professional group meetings and otherwise communicate with those groups on various matters, including the expression of opinions to appropriate congressional representatives, congressional committees or other deliberative bodies that influence public policy concerning species in danger of extinction, environmental management, the biological sciences and kindred subject, and federal regulatory agency activities affecting wildlife and its management. Also, as needed from time to time, the Society may contact its members, staff and volunteers to encourage them to express their views on pending legislation that may have a direct impact on the Society and its conservation programs. In FY22, the Society engaged in a county-wide referendum effort, which required the investment of additional funding and staff time.	ExplanationTxt

Schedule D IRS990ScheduleD

Field	Value	IRS element (for citing)
Funds And Other Accounts Held	2	FundsAndOtherAccountsHeldCnt
Funds And Other Accounts Contri	$280,924	FundsAndOtherAccountsContriAmt
Funds And Other Accounts Grants	$263,508	FundsAndOtherAccountsGrantsAmt
Funds And Other Accounts Vl EOY	$2,878,564	FundsAndOtherAccountsVlEOYAmt
Disclosed Org Leg Ctrl	false	DisclosedOrgLegCtrlInd
Disclosed For Charitable Prps	false	DisclosedForCharitablePrpsInd
Collection Used Pub Exhibition	Yes (X)	CollectionUsedPubExhibitionInd
Coll Used Scholarly Rsrch	Yes (X)	CollUsedScholarlyRsrchInd
Collection Used Preservation	Yes (X)	CollectionUsedPreservationInd
Coll Used Loan Or Exch Prog	Yes (X)	CollUsedLoanOrExchProgInd
Solicited Assets Sale	false	SolicitedAssetsSaleInd

CY Endwmt Fund CYEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$25,383,000	BeginningYearBalanceAmt
Contributions	$28,000	ContributionsAmt
Investment Earnings Or Losses	$256,000	InvestmentEarningsOrLossesAmt
Other Expenditures	$874,000	OtherExpendituresAmt
Administrative Expenses	$53,000	AdministrativeExpensesAmt
End Year Balance	$24,740,000	EndYearBalanceAmt

CY Minus1 Yr Endwmt Fund CYMinus1YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$24,562,000	BeginningYearBalanceAmt
Contributions	$3,000	ContributionsAmt
Investment Earnings Or Losses	$831,000	InvestmentEarningsOrLossesAmt
Administrative Expenses	$13,000	AdministrativeExpensesAmt
End Year Balance	$25,383,000	EndYearBalanceAmt

CY Minus2 Yr Endwmt Fund CYMinus2YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$22,362,000	BeginningYearBalanceAmt
Contributions	$172,000	ContributionsAmt
Investment Earnings Or Losses	$2,998,000	InvestmentEarningsOrLossesAmt
Other Expenditures	$927,000	OtherExpendituresAmt
Administrative Expenses	$43,000	AdministrativeExpensesAmt
End Year Balance	$24,562,000	EndYearBalanceAmt

CY Minus3 Yr Endwmt Fund CYMinus3YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$19,131,000	BeginningYearBalanceAmt
Contributions	$321,000	ContributionsAmt
Investment Earnings Or Losses	$3,802,000	InvestmentEarningsOrLossesAmt
Other Expenditures	$849,000	OtherExpendituresAmt
Administrative Expenses	$43,000	AdministrativeExpensesAmt
End Year Balance	$22,362,000	EndYearBalanceAmt

CY Minus4 Yr Endwmt Fund CYMinus4YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$20,074,000	BeginningYearBalanceAmt
Contributions	$1,573,000	ContributionsAmt
Investment Earnings Or Losses	-$1,642,000	InvestmentEarningsOrLossesAmt
Other Expenditures	$834,000	OtherExpendituresAmt
Administrative Expenses	$40,000	AdministrativeExpensesAmt
End Year Balance	$19,131,000	EndYearBalanceAmt

Field	Value	IRS element (for citing)
Board Designated Balance EOY	0.23000	BoardDesignatedBalanceEOYPct
Prmnnt Endowment Balance EOY	0.42000	PrmnntEndowmentBalanceEOYPct
Term Endowment Balance EOY	0.35000	TermEndowmentBalanceEOYPct
Endowments Held Unrelated Org	Yes (true)	EndowmentsHeldUnrelatedOrgInd
Endowments Held Related Org	false	EndowmentsHeldRelatedOrgInd

Leasehold Improvements LeaseholdImprovementsGrp

Field	Value	IRS element (for citing)
Other Cost Or Other Basis	$278,736,623	OtherCostOrOtherBasisAmt
Depreciation	$168,161,406	DepreciationAmt
Book Value	$110,575,217	BookValueAmt

Equipment EquipmentGrp

Field	Value	IRS element (for citing)
Other Cost Or Other Basis	$9,571,979	OtherCostOrOtherBasisAmt
Depreciation	$8,638,996	DepreciationAmt
Book Value	$932,983	BookValueAmt

Other Land Buildings OtherLandBuildingsGrp

Field	Value	IRS element (for citing)
Other Cost Or Other Basis	$1,278,263	OtherCostOrOtherBasisAmt
Book Value	$1,278,263	BookValueAmt

Field	Value	IRS element (for citing)
Total Book Value Land Buildings	$112,786,463	TotalBookValueLandBuildingsAmt

Other Securities OtherSecuritiesGrp (2 entries)

DescDesc
Financial derivatives and other financial products
Closely-held equity interests

Other Liabilities Org OtherLiabilitiesOrgGrp (7 entries)

DescDesc	AmtAmt
Federal income taxes
Accrued Post Retirement Benefit Obligation	$1,311,869
Accrued Sick Pay Benefit Obligation	$1,132,735
Charitable Gift Annuity Obligation	$145,958
Market Value of Swap Agreements	-$17,600
Unamortized Bond Issue Costs	-$144,396
Other	$1,217

Field	Value	IRS element (for citing)
Total Liability	$2,429,783	TotalLiabilityAmt
Footnote Text	Yes (X)	FootnoteTextInd
Total Rev Etc Audited Fincl Stmt	$79,050,000	TotalRevEtcAuditedFinclStmtAmt
Net Unrealized Gains Invst	-$3,554,560	NetUnrealizedGainsInvstAmt
Donated Services And Use Fclts	$287,160	DonatedServicesAndUseFcltsAmt
Revenue Not Reported	-$3,267,400	RevenueNotReportedAmt
Revenue Subtotal	$82,317,400	RevenueSubtotalAmt
Investment Expenses Not Incld	$146,501	InvestmentExpensesNotIncldAmt
Other Revenues Not Included	-$244,591	OtherRevenuesNotIncludedAmt
Revenue Not Reported Fincl Stmt	-$98,090	RevenueNotReportedFinclStmtAmt
Total Revenue Per Form990	$82,219,310	TotalRevenuePerForm990Amt
Tot Expns Etc Audited Fincl Stmt	$60,489,000	TotExpnsEtcAuditedFinclStmtAmt
Donated Services Use Fclts	$287,160	DonatedServicesUseFcltsAmt
Other Expenses Included	-$354,868	OtherExpensesIncludedAmt
Expenses Not Reported	-$67,708	ExpensesNotReportedAmt
Expenses Subtotal	$60,556,708	ExpensesSubtotalAmt
Investment Expenses Not Incld2	$146,501	InvestmentExpensesNotIncld2Amt
Expenses Not Rpt Fincl Stmt	$146,501	ExpensesNotRptFinclStmtAmt
Total Expenses Per Form990	$60,703,209	TotalExpensesPerForm990Amt

Supplemental Information Detail SupplementalInformationDetail (8 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
I 5 and 6	The Society does not maintain any donor advised funds. Other Funds consist of the Chicago Board of Trade Endangered Species Fund and the CZS Womens Board Fund. Contributions to these funds come from donors as well as proceeds from fundraising events and investment income. Grants are decided by committees as described in Schedule I. At times, donors who have given money to the fund may also sit on the granting committee but no one donor may decide on the grant awards. All grants awarded must follow the guidelines and processes established by CZS. CZS Board of Trustees has final approval of all Chicago Board of Trade Endangered Species Fund Committee recommended grant awards. CZS Management has final approval of all CZS Womens Board recommended grant awards.
III 1A	Animal Collections, which were acquired through breeding loans, purchases and contributions, are not recognized as assets on the Statement of Financial Position. Costs to acquire collection items are recorded as decreases in unrestricted net assets in the year in which the animals are acquired. Proceeds from deaccessions are reflected as increases in the appropriate net asset class. The Societys animal collection consists of specimens with numerous attributes including taxonomic group, age, sex, relationship and value to other animals, endangered status and breeding potential. The Society retains a record of every animal in a permanent file. An inventory of the collection is prepared annually. Professionally trained keeper staff and population managers provide daily care for the collection and determine population needs.
III 4	The more than 2500 ambassadors of the animal kingdom which make up the CZS collection provide our visitors a rare opportunity to see species from around the globe. The collection, in connection with our education programs, provides CZS the opportunity to teach guests about animals and nature, conservation and other related topics.
V 4	The Societys endowment consists of different funds established to support a variety of CZS programs including conservation and research, education and outreach, care of the animal collection and grounds, and general operations. Additionally, the Society is the designated beneficiary of the interest income on a 1 million endowment established and maintained by the Chicago Community Trust. The CCT maintains variance power over this endowment and, accordingly, the Society has not included it in its financial statements.
VI 1A-E	The Society operates a zoological park on land owned by the Forest Preserve District of Cook County, IL which is provided to the Society at no charge. The land site of the Zoo, accordingly, is not recorded on the Societys financial statements. All park improvements acquired by the Society are legally owned by the District. All park improvements acquired by the Society, including those acquired with District funds, are recorded as park improvements on the Societys financial statements. The amount in Other represents construction in progress on capital assets. Once a capital asset is complete and in use, the total amount for that project is closed out of construction in progress and transferred to park improvements.
X 2	The Society is a not-for-profit corporation and is exempt from tax under the provisions of Internal Revenue Code Section 501c3, except for taxes on unrelated business income. The Society has no liability for uncertain tax positions, therefore the Society does not include such a footnote as it is no longer required by generally accepted accounting principles.
XI 4b	Other Adjustments - Fundraising Event Expense -244,603 Rounding and Misc adjustments 12
XII 2d	Other Adjustments - change in market value of swap agreements -603,579, Fundraising Event Expense 244,603 Rounding and Misc adjustments 4,108

Schedule F IRS990ScheduleF

Field	Value	IRS element (for citing)
Grant Records Maintained	Yes (true)	GrantRecordsMaintainedInd

Account Activities Outside US AccountActivitiesOutsideUSGrp (8 entries)

RegionRegionTxt	Type Of Activities ConductedTypeOfActivitiesConductedTxt	Region Total ExpendituresRegionTotalExpendituresAmt	Specific Services ProvidedSpecificServicesProvidedTxt
East Asia and the Pacific	grants to recipients for fieldwork in region	$9,975
Europe Including Iceland and Greenland	program services	$15,081	memberships in conservation organizations
North America	grants to recipients for fieldwork in region	$5,000
Russia and the Neighboring States	grants to recipients for fieldwork in region	$10,000
South America	grants to recipients for fieldwork in region	$15,540
South Asia	grants to recipients for fieldwork in region	$32,975
Sub-Saharan Africa	program services	$1,226	conservation field work
Sub-Saharan Africa	grants to recipients for fieldwork in region	$65,436

Field	Value	IRS element (for citing)
Subtotal Spent	$155,233	SubtotalSpentAmt
Total Spent	$155,233	TotalSpentAmt

Grants To Org Outside US GrantsToOrgOutsideUSGrp (8 entries)

RegionRegionTxt	Purpose Of GrantPurposeOfGrantTxt	Cash GrantCashGrantAmt	Manner Of Cash DisbursementMannerOfCashDisbursementTxt
Russia and the Neighboring States	support for Ukranian Zoo animal care	$10,000	wire transfer
South America	conservation research fieldwork	$5,540	wire transfer
South Asia	conservation research fieldwork	$9,850	wire transfer
South Asia	conservation research fieldwork	$5,450	wire transfer
Sub-Saharan Africa	conservation research fieldwork	$5,440	wire transfer
Sub-Saharan Africa	conservation research fieldwork	$5,518	wire transfer
Sub-Saharan Africa	conservation research fieldwork	$10,872	wire transfer
Sub-Saharan Africa	conservation research fieldwork	$5,645	wire transfer

Field	Value	IRS element (for citing)
Total501c3 Org	8	Total501c3OrgCnt
Transfer To Foreign Corp	false	TransferToForeignCorpInd
Interest In Foreign Trust	false	InterestInForeignTrustInd
Foreign Corp Ownership	false	ForeignCorpOwnershipInd
Passive Foreign Investmest Co	false	PassiveForeignInvestmestCoInd
Foreign Partnership	false	ForeignPartnershipInd
Boycott Countries	false	BoycottCountriesInd

Supplemental Information Detail SupplementalInformationDetail (3 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Part I Line 2	The Society awards grants through its Chicago Board of Trade Endangered Species Fund CBT ESF. The grant cycle is 2 times per year. Grant proposals are reviewed by a team of four. Proposals may be endorsed by an IUCN Species Survival Committee or other major, internationally known conservation organization, the AZA/WAZA, or other major zoo organization. For any individuals/organizations who are not US Citizens/entities, the Society checks the most recent OFAC Control List of Specifically Designated and Blocked Persons as well as the Consolidated List established and maintained by the 1267 Committee with respect to Al-Qaida, Osama Bin Laden, and the Taliban and other individuals, groups, undertakings and entities associated with them. Approximately 50,000 is awarded each cycle, usually in amounts of 2000 to 5000 per grant. Final award recommendations are presented to the Executive Committee of the Board of Trustees by the CBOT Committee members. Final reports are due 1 year after the receipt of the funds along with a final accounting of the grant funds expended. In addition, other grant funds are given by the Society to major, internationally known conservation organizations in support of their general conservation mission. These contributions are determined by Society management. They are approved by the Board either as part of the annual operating budget process or as part of a periodic spending authorization from the Societys Board Designated Conservation Fund.
Part I Line 2 contd	The Society also holds funds raised for avian conservation and pangolin conservation programs. A small number of research grants are awarded from these funds each year. The grants awarded from these funds are approved by the Avian Scientific Advisory Group and the Pangolin Consortium Group. These groups are composed of staff from the Society and other like-minded institutions. Both groups have written grant application, awarding, tracking and reporting processes in place. All grant payments approved by the groups must follow the Societys established internal procedures before payment is made.
Part I Line 3, Col F	, Part II Line 1, and Part III All expenditures are reported using the accrual method of accounting.

Schedule G IRS990ScheduleG

Field	Value	IRS element (for citing)
Mail Solicitations	Yes (X)	MailSolicitationsInd
Email Solicitations	Yes (X)	EmailSolicitationsInd
Phone Solicitations	Yes (X)	PhoneSolicitationsInd
In Person Solicitations	Yes (X)	InPersonSolicitationsInd
Solicitation Of Non Govt Grants	Yes (X)	SolicitationOfNonGovtGrantsInd
Solicitation Of Govt Grants	Yes (X)	SolicitationOfGovtGrantsInd
Special Fundraising Events	Yes (X)	SpecialFundraisingEventsInd
Agrmt Prof Fundraising Acty	false	AgrmtProfFundraisingActyInd

Fundraiser Activity Info FundraiserActivityInfoGrp

Organization Business Name OrganizationBusinessName

Field	Value	IRS element (for citing)
Business Name Line1	A&Z Resources Inc	BusinessNameLine1Txt

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	14110 W 167 Street	AddressLine1Txt
City	Homer Glen	CityNm
State Abbreviation	IL	StateAbbreviationCd
ZIP	60491	ZIPCd

Field	Value	IRS element (for citing)
Activity	fundraising consulting	ActivityTxt
Fundraiser Control Of Funds	false	FundraiserControlOfFundsInd
Retained By Contractor	$53,460	RetainedByContractorAmt

Field	Value	IRS element (for citing)
Total Retained By Contractors	$53,460	TotalRetainedByContractorsAmt
Licensed States	FL	LicensedStatesCd
Licensed States	IL	LicensedStatesCd
Licensed States	IN	LicensedStatesCd
Licensed States	WI	LicensedStatesCd

Fundraising Event Information FundraisingEventInformationGrp

Field	Value	IRS element (for citing)
Event1	Whirl Virtual Gala	Event1Nm
Gross Receipts Event1	$1,206,196	GrossReceiptsEvent1Amt
Charitable Contri Event1	$1,109,421	CharitableContriEvent1Amt
Gross Revenue Event1	$96,775	GrossRevenueEvent1Amt
Non Cash Prizes Event1	$7,312	NonCashPrizesEvent1Amt
Entertainment Event1	$5,000	EntertainmentEvent1Amt
Other Direct Expenses Event1	$100,636	OtherDirectExpensesEvent1Amt
Event2	Conservation Awards Virtual Celebration	Event2Nm
Gross Receipts Event2	$299,396	GrossReceiptsEvent2Amt
Charitable Contri Event2	$287,546	CharitableContriEvent2Amt
Gross Revenue Event2	$11,850	GrossRevenueEvent2Amt
Non Cash Prizes Event2	$349	NonCashPrizesEvent2Amt
Rent Facility Costs Event2	$11,964	RentFacilityCostsEvent2Amt
Food And Beverage Event2	$30,048	FoodAndBeverageEvent2Amt
Other Direct Expenses Event2	$22,729	OtherDirectExpensesEvent2Amt
Other Events Total	5	OtherEventsTotalCnt
Gross Receipts Other Events	$233,397	GrossReceiptsOtherEventsAmt
Charitable Contri Other Events	$113,672	CharitableContriOtherEventsAmt
Gross Revenue Other Events	$119,725	GrossRevenueOtherEventsAmt
Non Cash Prizes Other Events	$16,568	NonCashPrizesOtherEventsAmt
Rent Fclty Costs Other Events	$2,000	RentFcltyCostsOtherEventsAmt
Food And Beverage Other Events	$63,783	FoodAndBeverageOtherEventsAmt
Entertainment Other Events	$200	EntertainmentOtherEventsAmt
Oth Direct Expnss Other Events	$52,511	OthDirectExpnssOtherEventsAmt
Gross Receipts Total	$1,738,989	GrossReceiptsTotalAmt
Charitable Contributions Tot	$1,510,639	CharitableContributionsTotAmt
Gross Revenue Total Events	$228,350	GrossRevenueTotalEventsAmt
Non Cash Prizes Total Events	$24,229	NonCashPrizesTotalEventsAmt
Rent Fclty Costs Total Events	$13,964	RentFcltyCostsTotalEventsAmt
Food And Beverage Total Events	$93,831	FoodAndBeverageTotalEventsAmt
Entertainment Total Events	$5,200	EntertainmentTotalEventsAmt
Oth Direct Expnss Total Events	$175,876	OthDirectExpnssTotalEventsAmt
Direct Expense Summary Events	$313,100	DirectExpenseSummaryEventsAmt
Net Income Summary	-$84,750	NetIncomeSummaryAmt

Schedule I IRS990ScheduleI

Field	Value	IRS element (for citing)
Grant Records Maintained	Yes (true)	GrantRecordsMaintainedInd

Recipient Table RecipientTable (2 entries)

Address Line1USAddress/AddressLine1Txt	CityUSAddress/CityNm	State AbbreviationUSAddress/StateAbbreviationCd	ZIPUSAddress/ZIPCd	Recipient EINRecipientEIN	IRC SectionIRCSectionDesc	Cash GrantCashGrantAmt	Purpose Of GrantPurposeOfGrantTxt
International Marine Animal Trainers Assoc
3252 Talbot St	San Diego	CA	92106	330588569	501c3	$10,000	Annual Conference Sponsor
Vote Yes for Clean Air Clean Water and Wildlife NFP
411 S Wells St Suite 300	Chicago	IL	60607	872472803	501c4	$350,000	Contrib to spt work on referendum campaign

Field	Value	IRS element (for citing)
Total501c3 Org	1	Total501c3OrgCnt
Total Other Org	1	TotalOtherOrgCnt

Grants Other Asst To Indiv In US GrantsOtherAsstToIndivInUSGrp

Field	Value	IRS element (for citing)
Grant Type	Educ. Scholarship for Conservation Education	GrantTypeTxt
Recipient	5	RecipientCnt
Cash Grant	$25,000	CashGrantAmt

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Part I Line 2	FormAndLineReferenceDesc
Explanation	CZS awards grants and assistance through a variety of programs. For awards under the CBT ESF and Avian and Pangolin Conservation Programs, as well as general contributions to major conservation organizations, see details in Schedule F, part V. CZS also provides grants and assistance through its educational scholarship programs. CZS maintains records to substantiate amounts, elegibility and selection criteria. Procedures are in place to monitor grants to ensure they are used for proper purposes including, where applicable, periodic reporting by the grantee.	ExplanationTxt

Schedule J IRS990ScheduleJ

Field	Value	IRS element (for citing)
Idemnification Gross Up Pmts	Yes (X)	IdemnificationGrossUpPmtsInd
Housing Allowance Or Residence	Yes (X)	HousingAllowanceOrResidenceInd
Written Policy Ref T And E Expnss	Yes (true)	WrittenPolicyRefTAndEExpnssInd
Substantiation Required	Yes (true)	SubstantiationRequiredInd
Compensation Committee	Yes (X)	CompensationCommitteeInd
Independent Consultant	Yes (X)	IndependentConsultantInd
Form990 Of Other Organizations	Yes (X)	Form990OfOtherOrganizationsInd
Compensation Survey	Yes (X)	CompensationSurveyInd
Board Or Committee Approval	Yes (X)	BoardOrCommitteeApprovalInd
Severance Payment	Yes (true)	SeverancePaymentInd
Supplemental Nonqual Rtr Plan	false	SupplementalNonqualRtrPlanInd
Equity Based Comp Arrngm	false	EquityBasedCompArrngmInd
Comp Based On Revenue Of Flng Org	false	CompBasedOnRevenueOfFlngOrgInd
Comp Bsd On Rev Related Orgs	false	CompBsdOnRevRelatedOrgsInd
Comp Bsd Net Earns Flng Org	false	CompBsdNetEarnsFlngOrgInd
Comp Bsd Net Earns Rltd Orgs	false	CompBsdNetEarnsRltdOrgsInd
Any Non Fixed Payments	Yes (true)	AnyNonFixedPaymentsInd
Initial Contract Exception	Yes (true)	InitialContractExceptionInd
Rebuttable Presumption Proc	Yes (true)	RebuttablePresumptionProcInd

Rltd Org Officer Trst Key Empl RltdOrgOfficerTrstKeyEmplGrp (11 entries)

TitleTitleTxt	Base Compensation Filing OrgBaseCompensationFilingOrgAmt	Bonus Filing OrganizationBonusFilingOrganizationAmount	Other Compensation Filing OrgOtherCompensationFilingOrgAmt	Deferred Compensation Flng OrgDeferredCompensationFlngOrgAmt	Nontaxable Benefits Filing OrgNontaxableBenefitsFilingOrgAmt	Total Compensation Filing OrgTotalCompensationFilingOrgAmt
Dr Michael Adkesson
President and CEO as of 10/21	$213,676	$24,100	$1,175	$4,179	$35,385	$278,515
Stuart D Strahl PhD
President and CEO through 11/21 Trustee	$456,927	$19,719	$306,748	$8,700	$23,567	$815,661
Cynthia W Zeigler
Chief Advancement Officer through 12/21	$314,579	$12,786	$177,732	$5,850	$10,540	$521,487
David E Burns
Chief Financial and Admin. Officer	$334,658	$50,000	$2,784	$6,654	$23,900	$417,996
Frank W Zeigler
Sr. VP Animal Programs	$221,096	$9,120	$15,175	$5,572	$9,420	$260,383
Sarah Breen-Bartecki
Sr. VP Conserv Pgms, ResearchFunding	$229,610	$9,356	$3,991	$7,310	$10,018	$260,285
Mary A Cronin
Master Planning Coordinator	$200,000			$6,000		$206,000
Michael Owens
VP Information Technology	$179,461	$7,270	$4,021	$4,500	$2,527	$197,779
Leah Rippe
VP Marketing Communications	$178,216	$7,352	$3,732	$5,747	$23,534	$218,581
Jerome E Johnston
VP Guest Services Operations	$166,791	$6,716	$5,493	$4,534	$6,709	$190,243
Sandra L Dornhecker
Sr. VP Human Resources	$162,722	$6,826	$5,408	$2,659	$23,493	$201,108

Supplemental Information Detail SupplementalInformationDetail (4 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Part I Line 1a	As provided for in the executive employment agreement approved by the Board of Trustees, the out-going President received a housing allowance and a gross up payment equivalent to the tax obligation for the value of the Society provided life insurance. Both were treated as taxable compensation to the out-going President.
Part I Line 4a	As provided for in the Severance Agreement with the Chief Advancement Officer related to the elimination of the position, she received a severance payment of 164,097. As provided for in the executive employment agreement approved by the Board of Trustees, the out-going President received an end of contract payout of 246,485.
Part I Line 7	In lieue of 2 consecutive years with no annual increases for most staff, full-time permanent employees received a lump sum bonus during calendar year 2021 equal to a percentage of their standard pay. The Chief Administrative and Financial Officer received a lump sum bonus related to the assumption of additional responsibilities. All bonuses were approved by the Board of Trustees. In addition, the in-coming President received a signing bonus as provided for in his executive employment agreement approved by the Board of Trustees.
Part I Line 8	The new President, hired in October 2021, is being paid per a binding written agreement qualifying for the initial contract exception per Regs. section 53.4958-4a3

Schedule K IRS990ScheduleK

Tax Exempt Bonds Issues TaxExemptBondsIssuesGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd

Issuer Name IssuerName

Field	Value	IRS element (for citing)
Business Name Line1	Village of Brookfield Cook County IL	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Bond Issuer EIN	366005807	BondIssuerEIN
CUSIP	112732AAO	CUSIPNum
Bond Issued	2008-06-18	BondIssuedDt
Issue Price	$39,850,000	IssuePriceAmt
Purpose	Construction and renovation of certain buildings and exhibits	PurposeDesc
Defeased	false	DefeasedInd
On Behalf Of Issuer	false	OnBehalfOfIssuerInd
Pool Financing	false	PoolFinancingInd

Tax Exempt Bonds Proceeds TaxExemptBondsProceedsGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Retired	$10,930,000	RetiredAmt
Total Proceeds	$39,850,000	TotalProceedsAmt
Capitalized Interest	$595,445	CapitalizedInterestAmt
Issuance Costs From Proceeds	$296,598	IssuanceCostsFromProceedsAmt
Capital Expenditures	$30,539,559	CapitalExpendituresAmt
Substantial Completion	2010	SubstantialCompletionYr
Refunding Tax Exempt Bonds	false	RefundingTaxExemptBondsInd
Refunding Taxable Bonds	false	RefundingTaxableBondsInd
Final Allocation Made	Yes (true)	FinalAllocationMadeInd
Adequate Books And Rec Maint	Yes (true)	AdequateBooksAndRecMaintInd

Tax Exempt Bonds Private Bus Use TaxExemptBondsPrivateBusUseGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Owning Bond Financed Property	false	OwningBondFinancedPropertyInd
Any Lease Arrangements	false	AnyLeaseArrangementsInd
Mgmt Contract Bond Fincd Prop	false	MgmtContractBondFincdPropInd
Any Research Agreements	false	AnyResearchAgreementsInd
Bond Iss Meet Prvt Sec Pymt Test	false	BondIssMeetPrvtSecPymtTestInd
Change In Use Bond Financed Prop	false	ChangeInUseBondFinancedPropInd
Procs Nonqualified Bond Remdtd	Yes (true)	ProcsNonqualifiedBondRemdtdInd

Tax Exempt Bonds Arbitrage TaxExemptBondsArbitrageGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Form8038 T Filed	false	Form8038TFiledInd
No Rebate Due	Yes (true)	NoRebateDueInd
Variable Rate Issue	Yes (true)	VariableRateIssueInd
Hedge Identified In Bks And Rec	Yes (true)	HedgeIdentifiedInBksAndRecInd

Hedge Provider Name HedgeProviderName

Field	Value	IRS element (for citing)
Business Name Line1	The Northern Trust Co	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Term Of Hedge	0000000010.000000000000	TermOfHedgePct
Superintegrated Hedge	false	SuperintegratedHedgeInd
Hedge Terminated	false	HedgeTerminatedInd
Gross Proceeds Invested In GIC	false	GrossProceedsInvestedInGICInd
Gross Proceeds Invested	false	GrossProceedsInvestedInd
Written Proc To Monitor Reqs	Yes (true)	WrittenProcToMonitorReqsInd

Procedures Corrective Action ProceduresCorrectiveActionGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Procedures Corrective Action	Yes (true)	ProceduresCorrectiveActionInd

Supplemental Information Detail SupplementalInformationDetail (2 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Part II Line 11A	Some proceeds of the bonds were used to retire a portion of the bonds as reported in Part II, Line 1A
Part IV Line 2c	Column A The rebate calculation was performed by an independent rebate consultant in March 2013 indicating no rebate was due and advising that as long as all assumptions remained true it was no longer necessary to compute excess with respect to these bonds.

Schedule L IRS990ScheduleL

Bus Tr Involve Interested Prsn BusTrInvolveInterestedPrsnGrp (3 entries)

Relationship DescriptionRelationshipDescriptionTxt	TransactionTransactionAmt	TransactionTransactionDesc	Sharing Of RevenuesSharingOfRevenuesInd
Cynthia W Zeigler
Family Member of Key Employee	$488,833	employment	false
Frank W Zeigler
Family Member of Key Employee	$368,708	employment	false
A&Z Resources Inc
Corporation in which a Key Employee is greater than 35 owner	$53,460	consulting services	false

Supplemental Information Detail SupplementalInformationDetail (3 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Part IV Line 1	During FY22, Cynthia W. Zeigler was employed as Chief Advancement Officer. She is a family member of key employee Frank W. Zeigler. Her employment follows the Societys established recruiting, hiring and compensation policies. Her employment with the Society ended in December 2021.
Part IV Line 2	During FY22, Frank W. Zeigler was employed as Sr. VP Animal Programs. He is a family member of key employee Cynthia W. Zeigler. His employment follows the Societys established recruiting, hiring and compensation policies. His employment with CZS ended February 2022.
Part IV Line 3	During Jan 2022, CZS entered into a contract with AZ Resources, a corporation in which Cynthia W. Zeigler is a more then 35 owner. The corporation was engaged by the Society to provide fundraising management consulting to the Society.

Schedule M IRS990ScheduleM

Works Of Art WorksOfArtGrp

Field	Value	IRS element (for citing)
Non Cash Checkbox	Yes (X)	NonCashCheckboxInd
Contribution	2	ContributionCnt
Noncash Contributions Rpt F990	$32,825	NoncashContributionsRptF990Amt
Method Of Determining Revenues	museum assessed mkt value	MethodOfDeterminingRevenuesTxt

Securities Publicly Traded SecuritiesPubliclyTradedGrp

Field	Value	IRS element (for citing)
Non Cash Checkbox	Yes (X)	NonCashCheckboxInd
Contribution	34	ContributionCnt
Noncash Contributions Rpt F990	$1,932,543	NoncashContributionsRptF990Amt
Method Of Determining Revenues	price of stock on gift date	MethodOfDeterminingRevenuesTxt

Scientific Specimens ScientificSpecimensGrp

Field	Value	IRS element (for citing)
Non Cash Checkbox	Yes (X)	NonCashCheckboxInd
Contribution	58	ContributionCnt

Other Non Cash Contri Table OtherNonCashContriTableGrp (4 entries)

Non Cash CheckboxNonCashCheckboxInd	DescDesc	ContributionContributionCnt	Noncash Contributions Rpt F990NoncashContributionsRptF990Amt	Method Of Determining RevenuesMethodOfDeterminingRevenuesTxt
Yes (X)	Operating Supplies	31	$529,762	cost or selling price
Yes (X)	Charity Auction Items	106	$68,497	cost or selling price
Yes (X)	Charity Fundraiser supplies	13	$12,563	cost or selling price
Yes (X)	Medical Equipment	1	$19,153	cost or selling price

Field	Value	IRS element (for citing)
Any Property That Must Be Held	false	AnyPropertyThatMustBeHeldInd
Review Process Unusual NC Gifts	Yes (true)	ReviewProcessUnusualNCGiftsInd
Third Parties Used	Yes (true)	ThirdPartiesUsedInd

Supplemental Information Detail SupplementalInformationDetail (3 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Part I Line Line 32b	The Society has an agreement with IDonate to process certain non cash donations on behalf of the Society. Donors donate their items to IDonate Foundation/Servant Foundation, a 501c3 organization, who sells the items, retains a commission and issues a cash grant to the Society for the remainder.
Part I Line 33	Securities Current year contributions of stock which represent payments on pledges recorded as contribution in a previous year are not included in the revenue shown on Form 990, Part VIII, Line 1g. Stock gifts which represent payments of Conditional Contributions for which the conditions for revenue recogntion have not yet been met are also not included in the revenue shown on Form 990, Part VIII, Line 1g.
Part I Line 33	Collection Items/Scientific Specimens A zero dollar amount was reported on Form 990, Part VIII, Line 1g because the Society does not capitalize its collection, as allowed under SFAS 116.

Schedule O IRS990ScheduleO

Supplemental Information Detail SupplementalInformationDetail (11 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Form 990, Part V, Section A, Line 1A	The fiscal, general oversight, and policies of the Society are vested in a Board of not more than 58 Trustees. As of March 31, 2022, there were 43 voting Trustess. The elected Officers of the Board, the chairs of the standing committees and such other Trustees as may be appointed by the Chairman constitute the Executive Committee. The Executive Committee has the power to transact all regular business of the Society during the period between the regular Board meetings.
Form 990, Part VI, Section A, Line 2	Cindy Zeigler, Key Employee and Frank Zeigler, Key Employee - Family Relationship.
Form 990, Part VI, Section A, Line 3	All restaurant, retail and catering operations are outsourced to a third party service provider.
Form 990, Part VI, Section A, Line 6	The membership of the Society is composed of up to 250 Governing Members. Up to 55 of the 58 Board of Trustees are elected by the Governing Members at their annual meeting. Governing Members are also eligible for appointment by the Societys Chairman to serve on Board committees other than the Exectuive Committee. Governing Members are chosen by the Nominating Committee of the Board of Trustees and voted on by the full Board of Trustees.
Form 990, Part VI, Section A, Line 7A	The membership of the Society is composed of up to 250 Governing Members. Up to 55 of the 58 Board of Trustees are elected by the Governing Members at their annual meeting. Governing Members are also eligible for appointment by the Societys Chairman to serve on the Board committees other than the Executive Committee. Governing Members are chosen by the Nominating and Govenance Committee of the Board of Trustees and voted on by the full Board of Trustees.
Form 990, Part VI, Section B, Line 11B	The IRS Form 990 is prepared by Societys management and reviewed and signed by the Societys tax advisor. The Form 990, excluding Schedule B-Schedule of Contributors, is also reviewed by the Audit Committee of the Board of Trustees. A copy of the entire final version of the form, excluding Schedule B, is also made available to the Board of Trustees prior to filing with the IRS. Schedule B is excluded from Audit Committee and Board of Trustee review to honor the wishes of certain large donors who wish to remain anonymous in their giving.
Form 990, Part VI, Section B, Line 12C	Annually, a conflict of interest form is sent out to all members of the Board of Trustess, Key Employees and any employee with purchasing authority. The form covers potential conflicts through financial interests, use of Society services, priviledged information and representation of Society interests. It also covers specific disclosures required by the IRS Form 990 and the Illinois AG990IL. Board of Trustees responses are reviewed by the Secretary of the Board and the Chief Financial Officer who together determine if a conflict exists. Employee responses are reviewed by the VP Human Resources and the Chief Financial Officer. Any conflicts are addressed to ensure that all internal procedures are followed for any transactions with that individual and that all items requiring disclosure are properly noted. Any Board members with a conflict must abstain from voting on decisions involving the transaction in question. Any transactions entered into with interested parties follow the Societys established procurement policies and are provided at rates competitive with market rates.
Form 990, Part VI, Section B, Line 15A and 15B	The Societys policy for approval of compensation arrangements with officers and certain senior employees requires review and approval of the compensation arrangement by the Executive Committee of the Board, excluding anyone who is related to or under the control of the person involved in the arrangement. The Committee relies on appropriate comparability data which indicates the types and levels of similar compensation and benefit packages for similar positions provided by similar organizations. The Committee documents the basis for its determination of the reasonableness of compensation. This process is done annually for the President, Sr. VP of Operatons, Chief Financial Officer and the Chief Advancement Officer any year where there is an increase in compensation.
Form 990, Part VI, Section C, Line 19	Governing documents are available through applicable governmental agencies the conflict of interest policy and financial statements are available upon written request to the Society.
Form 990, Part XI, Line 9	Other Changes in net assets or fund balances Changes in Post Retirement Benefits not yet recognized in operations -2301 change in market value of swap agreements 603,579 rounding and other -3,819.
Form 990, Part I, Line 8-22	The prior year amounts reflect the short year period from 1/1/21-3/31/21 due a change in accounting period.