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      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>262288</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>262288</TotalRevenueColumnAmt>
        <ExclusionAmt>262288</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <OtherRevenueMiscGrp>
        <Desc>MISCELLANEOUS REVENUE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>18907</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>18907</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>18907</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>6782103</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>4997859</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>1766802</ExclusionAmt>
      </TotalRevenueGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>193663</TotalAmt>
        <ProgramServicesAmt>119429</ProgramServicesAmt>
        <ManagementAndGeneralAmt>74234</ManagementAndGeneralAmt>
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      <OtherSalariesAndWagesGrp>
        <TotalAmt>368364</TotalAmt>
        <ProgramServicesAmt>250184</ProgramServicesAmt>
        <ManagementAndGeneralAmt>110324</ManagementAndGeneralAmt>
        <FundraisingAmt>7856</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>12547</TotalAmt>
        <ProgramServicesAmt>8526</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3840</ManagementAndGeneralAmt>
        <FundraisingAmt>181</FundraisingAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>47787</TotalAmt>
        <ProgramServicesAmt>42547</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4305</ManagementAndGeneralAmt>
        <FundraisingAmt>935</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>46115</TotalAmt>
        <ProgramServicesAmt>31131</ProgramServicesAmt>
        <ManagementAndGeneralAmt>14322</ManagementAndGeneralAmt>
        <FundraisingAmt>662</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>255296</TotalAmt>
        <ProgramServicesAmt>255296</ProgramServicesAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>65532</TotalAmt>
        <ManagementAndGeneralAmt>65532</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>418255</TotalAmt>
        <ManagementAndGeneralAmt>418255</ManagementAndGeneralAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <AdvertisingGrp>
        <TotalAmt>9342</TotalAmt>
        <ProgramServicesAmt>333</ProgramServicesAmt>
        <ManagementAndGeneralAmt>75</ManagementAndGeneralAmt>
        <FundraisingAmt>8934</FundraisingAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>68522</TotalAmt>
        <ProgramServicesAmt>34541</ProgramServicesAmt>
        <ManagementAndGeneralAmt>27935</ManagementAndGeneralAmt>
        <FundraisingAmt>6046</FundraisingAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>30199</TotalAmt>
        <ProgramServicesAmt>21763</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8436</ManagementAndGeneralAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>61683</TotalAmt>
        <ProgramServicesAmt>41847</ProgramServicesAmt>
        <ManagementAndGeneralAmt>18963</ManagementAndGeneralAmt>
        <FundraisingAmt>873</FundraisingAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>20274</TotalAmt>
        <ProgramServicesAmt>18654</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1614</ManagementAndGeneralAmt>
        <FundraisingAmt>6</FundraisingAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>3838</TotalAmt>
        <ProgramServicesAmt>3838</ProgramServicesAmt>
      </ConferencesMeetingsGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>3963</TotalAmt>
        <ProgramServicesAmt>1982</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1981</ManagementAndGeneralAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>23359</TotalAmt>
        <ProgramServicesAmt>14524</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8749</ManagementAndGeneralAmt>
        <FundraisingAmt>86</FundraisingAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>LAND MANAGER MANAGEMENT</Desc>
        <TotalAmt>1686652</TotalAmt>
        <ProgramServicesAmt>1686652</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>BIOTIC SURVEYS</Desc>
        <TotalAmt>142646</TotalAmt>
        <ProgramServicesAmt>142646</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>DUES AND SUBSCRIPTIONS</Desc>
        <TotalAmt>7912</TotalAmt>
        <ProgramServicesAmt>7629</ProgramServicesAmt>
        <ManagementAndGeneralAmt>283</ManagementAndGeneralAmt>
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      <AllOtherExpensesGrp>
        <TotalAmt>18754</TotalAmt>
        <ProgramServicesAmt>9018</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8620</ManagementAndGeneralAmt>
        <FundraisingAmt>1116</FundraisingAmt>
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      <TotalFunctionalExpensesGrp>
        <TotalAmt>3484703</TotalAmt>
        <ProgramServicesAmt>2690540</ProgramServicesAmt>
        <ManagementAndGeneralAmt>767468</ManagementAndGeneralAmt>
        <FundraisingAmt>26695</FundraisingAmt>
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      <CashNonInterestBearingGrp>
        <BOYAmt>1214337</BOYAmt>
        <EOYAmt>1404905</EOYAmt>
      </CashNonInterestBearingGrp>
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        <EOYAmt>9820317</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>14803</BOYAmt>
        <EOYAmt>18772</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>169833</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>98272</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
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        <EOYAmt>71561</EOYAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>70175664</EOYAmt>
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      <TotalAssetsGrp>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>2480111</EOYAmt>
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      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
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        <EOYAmt>79011108</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>70994846</BOYAmt>
        <EOYAmt>81491219</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>3297400</ReconcilationRevenueExpnssAmt>
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      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
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      <GiftsGrantsContrisRcvd509Grp>
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        <CurrentTaxYearMinus3YearsAmt>191887</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>210337</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>21985</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>17442</CurrentTaxYearAmt>
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      <Total509Grp>
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      <SubstAndDsqlfyPrsnsTotGrp>
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        <CurrentTaxYearAmt>4163</CurrentTaxYearAmt>
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      <TotalSupportCalendarYearGrp>
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      <InvestmentIncomePYPct>0.13720</InvestmentIncomePYPct>
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      <Form990ScheduleAPartVIGrp>
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    <IRS990ScheduleD documentId="RetDoc1039900001">
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      <Section170hRqrStsfdInd>0</Section170hRqrStsfdInd>
      <CYEndwmtFundGrp>
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        <EndYearBalanceAmt>65704256</EndYearBalanceAmt>
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        <EndYearBalanceAmt>55262444</EndYearBalanceAmt>
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        <EndYearBalanceAmt>48483658</EndYearBalanceAmt>
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      <CYMinus3YrEndwmtFundGrp>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART II, LINE 5:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE WILDLIFE HERITAGE FOUNDATION (WHF) SHALL MONITOR EACH OF ITS CONSERVATION EASEMENTS AT LEAST ONCE PER YEAR OR MORE FREQUENTLY IF REQUIRED IN THE EASEMENT OR IF THERE ARE ISSUES OF CONCERN. WHF SHALL ENFORCE ANY VIOLATIONS OF THE TERMS OF ITS CONSERVATION EASEMENTS TO PROTECT THE CONSERVATION VALUES OF THE LAND. THE CONSERVATION EASEMENTS ACCEPTED BY WHF REFLECT THESE TERMS BY SPECIFYING ANNUAL REQUIREMENTS TO MONITOR AND INSPECT AND TO ENFORCE ANY VIOLATIONS. WHF ACTIVELY SEEKS TO AVOID POTENTIAL EASEMENT VIOLATIONS THOUGH A VARIETY OF PREVENTATIVE ACTIONS. IT IS ALSO PREPARED TO ADDRESS POTENTIAL VIOLATIONS AND HAS PROCEDURES TO ADDRESS VIOLATIONS THAT CANNOT BE PREVENTED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART II, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CONSERVATION EASEMENTS ARE VALUED AT ZERO ON THE BALANCE SHEET</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>REVENUE FROM THE INVESTMENT OF ENDOWMENT FUNDS ARE USED FOR THE ONGOING STEWARDSHIP,MONITORING, MANAGEMENT, AND ENFORCEMENT OF LANDS AND WATERS PERMANENTLY-PROTECTED FOR WILDLIFE HABITAT AND FARMLAND CONSERVATION.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
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      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
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    <IRS990ScheduleL documentId="RetDoc1042800001">
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        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>KELLY M SHEA-VELASCO</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>FAMILY MEMBERS OF PATRICK SHEA WHO WAS A BOARD MEMBER IN 2017.</RelationshipDescriptionTxt>
        <TransactionAmt>65349</TransactionAmt>
        <TransactionDesc>EMPLOYED</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>ALEJANDRO VELASCO</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>FAMILY MEMBERS OF PATRICK SHEA WHO WAS A BOARD MEMBER IN 2017.</RelationshipDescriptionTxt>
        <TransactionAmt>25764</TransactionAmt>
        <TransactionDesc>EMPLOYED</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>ONE BOARD MEMBER ALSO SERVED AS A COMPENSATED STAFF MEMEBER FROM 1/1/2017 THROUGH 6/19/17. ALTHOUGH HIS LAST DAY IN THE OFFICE WAS 4/28/17, HE RESIGNED HIS POSITION ON THE BOARD OF DIRECTORS APPROXIMATELY 6/30/17.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 8B</FormAndLineReferenceDesc>
        <ExplanationTxt>NO COMMITTEES HAD AUTHORITY TO ACT ON BEHALF OF THE GOVERNING BODY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD RECEIVES A DIGITAL COPY OF THE TAX RETURN. THE RETURNS ARE REVIEWED PAGE BY PAGE, AND COMMENTS OR CORRECTIONS CAN BE OFFERED. THE OFFICER/EXECUTIVE DIRECTOR SIGNS THE EFILE AUTHORIZATION AND RETURNS THE FORMS 8879 TO THE TAX PREPARER TO INITIATE THE EFILE PROCESS. THE TAX PREPARER EFILES THE TAX RETURN. THE EFILE ACCEPTANCE FORM (9325) IS FORWARDED TO THE OFFICER/EXECUTIVE DIRECTOR WHEN RECEIVED BY THE TAX PREPARER. A FEDERAL AND STATE 9325 (PROOF OF EFILE) ARE KEPT ON FILE FOR EACH RETURN AS PROOF OF FILING FOR A TAX YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>OFFICERS AND KEY EMPLOYEES SUBMIT AN ANNUAL FORM TO DISCLOSE THE BUSINESS OR FAMILY RELATIONSHIPS THAT PRESENT CONFLICTS OF INTEREST AS DESCRIBED IN THE POLICY. OFFICERS, DIRECTORS, AND MANAGERS HAVE A DUTY TO DISCLOSE ANY CONFLICT, EXCUSE HIM/HERSELF FROM ANY DISCUSSION OF THE ITEM, AND TO ABSTAIN FROM ANY VOTE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPARABILITY DATA WAS IN A WRITTEN FORM AND SHARED WITH ALL BOARD MEMBERS IN 2016 AT THE TIME OF HIRE. NO RECORD WAS KEPT OF THE SUBSEQUENT DELIBERATIONS. DRAWING ON PUBLICALLY AVAILABLE FORM 990S OF SIMILAR ORGANIZATIONS IN CALIFORNIA, DATA WAS COLLECTED ON SEVERAL KEY FACTORS SUCH AS SALARY, ANNUAL BUDGET, ENDOWMENT SIZE, AND LAND HOLDINGS. THIS PROCESS WAS UNDERTAKEN IN 2016.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>COPIES OF THESE DOCUMENTS ARE AVAILABLE FROM THE ADMINISTRATIVE OFFICES IN LINCOLN, CA UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>WILDLIFE HERITAGE FOUNDATION CHANGED AUDITORS TO GILBERT ASSOCIATES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>