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      <Desc>Environmental Education Audubon Naturalist Societys educational mission is to nurture a lifetime of outdoor discovery, exploration and stewardship of nature for people in the Washington, DC metro region. Audubon Naturalist Society connects with individuals and groups of all ages to create a community of people who actively care for the natural world. Through our children and youth programs we reach more than 14,000 children each year with classroom visits, school field trips, afterschool programs, a licensed preschool, and summer camps. Our GreenKids program partners with public schools in Montgomery and Prince Georges counties in Maryland, Loudon County in Virginia and the District of Columbia to foster a culture of environmental stewardship in schools and provide professional development to teachers. Our continuing education programs educate and train more than 2,000 adults annually in natural history and conservation topics. Our outreach programs work to reach families in their communitiesnear where people live, work, and go to schooland connect them to nearby nature through engaging, hands-on activities and trainings. We work with community leaders, partner organizations, and empowered community members.</Desc>
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        <Desc>Sanctuaries The Audubon Naturalist Society maintains two nature sanctuaries: our headquarters 40-acre Woodend Sanctuary in Chevy Chase, MD and our 68-acre Rust Sanctuary in Leesburg, VA. ANS provides free public access to our sanctuaries and invites people to enjoy our trails, including a new wheelchair accessible trail at Woodend. The sanctuaries protect critical wildlife habitats in the DC metro region and provide opportunities for people to discover and appreciate the natural world through self-guided and naturalist-led experiences. ANS sanctuaries educate people of all ages and abilities about environmental stewardship, serve as gathering places for environmental classes and provide a hub for organizations working to preserve the quality of the environment in the Washington, DC area. ANS actively works to restore the habitats at its nature sanctuaries. Through our advocacy Action Network, more than 6,000 people learn about and take grassroots action with ANS annually to protect nature in the DC region.</Desc>
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        <Desc>The Audubon Naturalist Society conservation program works to promote healthy communities for people and wildlife through advocacy and policy across four priority areas in the DC Metro Region: human health &amp; access to nature; biodiversity &amp; habitats; the climate crisis; and sustainable land use. ANSs conservation outreach brings community members together to collect data on local flora, fauna and stream health and then uses that data to advocate for preservation of our regions special natural places. Each year we train and mobilize thousands of people to take action as monitors, stewards and advocates of our precious environment.</Desc>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
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      <PublicSupportPY509Pct>0.91710</PublicSupportPY509Pct>
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      <InvestmentIncomePYPct>0.07000</InvestmentIncomePYPct>
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        <CurrentYearMinus1Amt>281</CurrentYearMinus1Amt>
        <CurrentYearAmt>6506</CurrentYearAmt>
        <TotalAmt>9770</TotalAmt>
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      <AvgGrassrootsNontaxableGrp>
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        <CurrentYearMinus1Amt>109444</CurrentYearMinus1Amt>
        <CurrentYearAmt>92015</CurrentYearAmt>
        <TotalAmt>382981</TotalAmt>
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      <AvgGrassrootsLobbyingExpendGrp>
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        <CurrentYearMinus2Amt>49</CurrentYearMinus2Amt>
        <CurrentYearAmt>1111</CurrentYearAmt>
        <TotalAmt>1952</TotalAmt>
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    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="990D">
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      <TotalEasementsCnt>2</TotalEasementsCnt>
      <TotalAcreageCnt>90.00</TotalAcreageCnt>
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      <WrittenPolicyMonitoringInd>true</WrittenPolicyMonitoringInd>
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        <ContributionsAmt>500000</ContributionsAmt>
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      </CYEndwmtFundGrp>
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        <InvestmentEarningsOrLossesAmt>119397</InvestmentEarningsOrLossesAmt>
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        <EndYearBalanceAmt>916137</EndYearBalanceAmt>
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        <OtherExpendituresAmt>8000</OtherExpendituresAmt>
        <EndYearBalanceAmt>808185</EndYearBalanceAmt>
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      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>381947</BeginningYearBalanceAmt>
        <ContributionsAmt>400000</ContributionsAmt>
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        <OtherExpendituresAmt>8900</OtherExpendituresAmt>
        <EndYearBalanceAmt>793218</EndYearBalanceAmt>
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        <OtherExpendituresAmt>18189</OtherExpendituresAmt>
        <EndYearBalanceAmt>381947</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>0.01000</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.99000</PrmnntEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>false</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>false</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
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        <BookValueAmt>1254463</BookValueAmt>
      </LandGrp>
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        <DepreciationAmt>322552</DepreciationAmt>
        <BookValueAmt>172448</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
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        <DepreciationAmt>923536</DepreciationAmt>
        <BookValueAmt>1357089</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>458224</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>366308</DepreciationAmt>
        <BookValueAmt>91916</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>2875916</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>4269784</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>-1241038</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>33085</DonatedServicesAndUseFcltsAmt>
      <OtherRevenueAmt>377896</OtherRevenueAmt>
      <RevenueNotReportedAmt>-830057</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>5099841</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>36591</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>36591</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>5136432</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>4735569</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>33085</DonatedServicesUseFcltsAmt>
      <OtherExpensesIncludedAmt>377896</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>410981</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>4324588</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>36591</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>36591</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>4361179</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other revenues not included on Form 990 (Part XI, line 2d)</FormAndLineReferenceDesc>
        <ExplanationTxt>Rental Expenses</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other expenses not included on Form 990 (Part XII, line 2d)</FormAndLineReferenceDesc>
        <ExplanationTxt>Rental Expenses</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Footnote for uncertain tax position under FIN 48 (Part X)</FormAndLineReferenceDesc>
        <ExplanationTxt>The Society follows the Financial Accounting Standards Board Accounting Standards Codification, which provides guidance on accounting for uncertainty in income taxes recognized in the Societys financial statements, if any. As of the current year end, the Society had no unrecognized tax benefits related to uncertain tax positions in its information return that would qualify for either recognition or disclosure in its financial statements. The Societys policy would be to recognize interest and penalties on tax positions related to its unrecognized tax benefits in income tax expense in the financial statements. Through the fiscal year end, there have been no matters that would have resulted in an accrual for interest and/or penalties.Generally, only the three preceding tax years are subject to examination by federal, state, or local taxing authorities.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="990I">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Camp Scholarships</GrantTypeTxt>
        <RecipientCnt>23</RecipientCnt>
        <CashGrantAmt>19475</CashGrantAmt>
        <ValuationMethodUsedDesc>Cash</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>NA</NonCashAssistanceDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Other</GrantTypeTxt>
        <RecipientCnt>10</RecipientCnt>
        <CashGrantAmt>10649</CashGrantAmt>
        <ValuationMethodUsedDesc>Cash</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>NA</NonCashAssistanceDesc>
      </GrantsOtherAsstToIndivInUSGrp>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="990J">
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>false</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>false</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>false</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>false</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Lisa Alexander</PersonNm>
        <TitleTxt>Executive Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>155324</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>21978</DeferredCompensationFlngOrgAmt>
        <TotalCompensationFilingOrgAmt>177302</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleM documentId="990M">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>7</ContributionCnt>
        <NoncashContributionsRptF990Amt>750612</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Fair Value</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>Shop Supplies</Desc>
        <ContributionCnt>3</ContributionCnt>
        <NoncashContributionsRptF990Amt>6350</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Fair Value</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>false</ThirdPartiesUsedInd>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Members or stockholder classes and rights Part VI line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>Audubon Naturalist Society members support ANS vision of creating a larger, more diverse community of people who treasure the natural world and work to preserve it. Member support enables ANS to deliver high quality environmental education for all ages and lead advocacy work to protect and restore clean streams, healthy habitats, and special natural places in the DC metro region. In compliance with the Organizations bylaws, all members are entitled to vote at the ANS annual meeting of the members.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Member election for additional members Part VI line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Audubon Naturalist Society (ANS) board members are nominated by the governance/nominating committee and elected by ANS members at the Organizations annual meeting. ANS board members are elected for staggered three year terms, with a two-term limit.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing body decisions Part VI line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>Members of the Audubon Naturalist Society (ANS) elect new board members each year at the Organizations annual meeting. ANS bylaws can be amended only by member vote.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 governing body review Part VI line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 is prepared by an independent accounting firm and then reviewed in detail by the Audubon Naturalist Societys Treasurer and a working group of the Finance Committee and senior management, and presented to the Board of Directors before filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Conflict of interest policy compliance Part VI line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Upon joining the Audubon Naturalist Society (ANS) Board of Directors and/or its committees, and annually thereafter, members sign and date a conflict of interest disclosure statement. This statement is given to the board president by ANS board members. Salaried staff also sign and date a disclosure statement. Disclosure of actual, potential and perceived conflicts of interest is a normal, routine practice at board, committee and staff meetings. If a board member or staff member makes a conflict of interest disclosure, it is documented in the meeting minutes.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CEO executive director top management comp Part VI line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>The process for determining the executive directors compensation was negotiated at the time of hire and documented through the executive directors employment agreement that required an annual performance review by the Board of Directors.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other officer or key employee compensation Part VI line 15b</FormAndLineReferenceDesc>
        <ExplanationTxt>The compensation of other key employees is approved annually through the ANS budgeting process. Every few years, comparability data and market trends in the non-profit community are used to ensure that salaries of other key employees are in line with regional sector norms. This data, along with tenure and performance, are used to review and adjust compensation on an annual basis.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing documents etc available to public Part VI line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ANS IRS Form 990 and audited financial statements are posted on the ANS website and are available upon request. Other Organizational documents are available upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Audited by an independent accountant Part XII line 2b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Audubon Naturalist Society (ANS) finance committee provides oversight of selection of an independent audit firm.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>List of other fees for services expenses Part IX line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Consulting and Contract Services $720,259.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>General explanation attachment</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 Part III - Line 4A (Continuation)In a normal year, our adult environmental education programs bring more than 2,000 people into nature each year to de-stress, unplug and connect with the natural world. ANS educational programs serve more than 20,000 people annually.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
