Liabilities / Assets
9th percentile
Tied with the lowest-debt nonprofits in its peer group.
EIN 94-6076664 • 501(c)3 • Mill Valley, CA
Profile
The marin audubon society is dedicated to active participation in conservation, environmental education, and enjoyment of our natural heritage. We advocate sound land and water resource planning, and act to restore, enhance, and safeguard our wetlands and other natural habitats. Birds and other wildlife are the indicators of the health or our environment, and we remain committed to their protection and preservation.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
9th percentile
Tied with the lowest-debt nonprofits in its peer group.
Liabilities / Revenue
10th percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
25th percentile
Higher net margin than 25% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
35th percentile
Faster asset growth than 35% of similar nonprofits.
Revenue Growth
49th percentile
Faster revenue growth than 49% of similar nonprofits.
Assets
Up$7,376,758
Up $557,936 (+8.2%) from 2023
Liabilities
Flat$0
Flat from 2023
Net Assets
Up$7,376,758
Up $557,936 (+8.2%) from 2023
Revenue
Up$1,005,699
Up $68,716 (+7.3%) from 2023
Expenses
Down$563,461
Down $428,297 (-43%) from 2023
Net Income
Up$442,238
Up $497,013 (+907%) from 2023
Most recent year
2024 • Form 990XML pending. An XML filing is linked for this year, but detailed extraction is still pending.
The latest 2024 filing currently has linked XML that has not been fully parsed yet. Showing the latest detailed filing from 2023 below.
The marin audubon society is dedicated to active participation in conservation, environmental education, and enjoyment of our natural heritage. We advocate sound land and water resource planning, and act to restore, enhance, and safeguard our wetlands and other natural habitats. Birds and other wildlife are the indicators of the health or our environment, and we remain committed to their protection and preservation.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $4,667,993 | $4,667,993 | → $0 |
| Investments in Publicly Traded Securities | $1,598,145 | $1,719,125 | ▲ $120,980 |
| Savings and Temporary Cash Investments | $269,769 | $233,373 | ▼ $36,396 |
| Cash and Non-Interest-Bearing Accounts | $257,595 | $170,020 | ▼ $87,575 |
| Accounts Receivable | - | $28,311 | - |
| Other Notes and Loans Receivable, Net | - | $0 | - |
| Pledges and Grants Receivable | - | $0 | - |
| Receivable From Disqualified Prsn | - | $0 | - |
| Receivables From Officers Etc | - | $0 | - |
| Investments Other Securities | - | $0 | - |
| Investments Program Related | - | $0 | - |
| Intangible Assets | - | $0 | - |
| Inventories for Sale or Use | - | $0 | - |
| Prepaid Expenses and Deferred Charges | - | $0 | - |
| Total Assets | $6,793,502 | $6,818,822 | ▲ $25,320 |
| Other Assets Total | - | $0 | - |
| Liabilities | |||
| Total Liabilities | $0 | $0 | → $0 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $6,793,502 | $6,818,822 | ▲ $25,320 |
| Total Net Assets Fund Balance | $6,793,502 | $6,818,822 | ▲ $25,320 |
| Total Liabilities and Net Assets / Fund Balance | $6,793,502 | $6,818,822 | ▲ $25,320 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Land | $4,667,993 | - | - |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2022 | $1,712,607 | - | ▲ $143,808 | $50,000 | $1,806,415 |
| 2021 | $1,943,125 | - | ▼ $230,518 | - | $1,712,607 |
| 2020 | $1,512,019 | $99,312 | ▲ $331,794 | - | $1,943,125 |
| 2019 | $1,364,315 | $133,527 | ▲ $44,177 | $30,000 | $1,512,019 |
| 2018 | $1,223,232 | $56,934 | ▲ $84,149 | - | $1,364,315 |
| Name | Title |
|---|---|
| Robert Hinz | Membershp Chair |
| Barbara Salzman | President |
| Lowell Sykes | Vice President |
| Mike Anderson | Director |
| Roger Harris | Conservation Ch |
| Elyse Omernick | Outreach |
| Clint Kellner | Property Mgt |
| Edward Nute | Property Mgt |
| Leila Lanctot | Secretary |
| Jude Stalker | Special Prj Ch |
| Martha Jarocki | Treasurer |
| Ellena Ochoa | Volunteer Coord |
| Doug Waterman | VP/rail Editor |
| Contractor | Services | Location | Compensation |
|---|---|---|---|
| Environmental Science Associates | Engineering Services | 550 KEARNEY STREET STE 800, San Francisco, CA 94108 | $553,719 |
| Line Item | Amount |
|---|---|
| Other Expenses | $991,758 |
| Total Fundraising Expense | $11,081 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Fees for Services Legal | $54,986 | - | - | $54,986 |
| All Other Expenses | $10,957 | $1,614 | $3,833 | $16,404 |
| Insurance | - | $10,467 | - | $10,467 |
| Fees for Services Other | $8,250 | $1,338 | - | $9,588 |
| Other Expenses | $8,350 | - | $7,248 | $8,350 |
| Fees for Services Accounting | - | $6,376 | - | $6,376 |
| Office Expenses | - | $831 | - | $831 |
| Total Functional Expenses | $960,051 | $20,626 | $11,081 | $991,758 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Receivables from Disqualified Persons | - | $0 | - |
| Receivables from Officers, Directors, Trustees, and Key Employees | - | $0 | - |
“The organization's membership have the ability to vote for board directors.”
“Members vote in bylaw changes and other governing decisions.”
“An electronic copy of this tax return is sent to the board of directors for review prior to its filing.”
“The policy is reviewed annually with the board. All board members are required to disclose any conflicts. The board votes to approve any potential conflicts that have been disclosed.”
“The organization makes its governing documents, financial statements and policies available to the public via guidestar on the internet or in person upon request.”
“Accounting for conservation easementseasements were granted without any associated value. As such they are not separately identifiable in the organization's financial statements. The associated land, for which the easement is intended, is capitalized and reported in the organization's statement of financial position.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 28311 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | THE MARIN AUDUBON SOCIETY IS DEDICATED TO ACTIVE PARTICIPATION IN CONSERVATION, ENVIRONMENTAL EDUCATION, AND ENJOYMENT OF OUR NATURAL HERITAGE. WE ADVOCATE SOUND LAND AND WATER RESOURCE PLANNING, AND ACT TO RESTORE, ENHANCE, AND SAFEGUARD OUR WETLANDS AND OTHER NATURAL HABITATS. BIRDS AND OTHER WILDLIFE ARE THE INDICATORS OF THE HEALTH OR OUR ENVIRONMENT, AND WE REMAIN COMMITTED TO THEIR PROTECTION AND PRESERVATION. |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 0 |
| IRS990/AllOtherContributionsAmt | 0 | 156247 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 3833 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 1614 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 10957 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 16404 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | MARTHA JAROCKI |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4159249559 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 599 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | MILL VALLEY |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94942 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 257595 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 170020 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | true |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 553719 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 550 KEARNEY STREET STE 800 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | SAN FRANCISCO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 94108 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | ENVIRONMENTAL SCIENCE ASSOCIATES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | Engineering Services |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 866641 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 63793 |
| IRS990/CYOtherExpensesAmt | 0 | 991758 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 6549 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -54775 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 991758 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 11081 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 936983 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | true |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 0 |
| IRS990/Desc | 0 | CONSERVATION: Received grant for sea level rise adaptation project to expand marsh habitat and increase flood protections and provide public access for nearby underserved community. The project, on our 20-acre property in San Rafael, includes preparing technical studies, refining design, and conducting CEQA review and public outreach. Continued stewardship activities on our other properties (comprising over 500 acres), includes revegetation with over 15,000 native plants. Advocated for the protection of wildlife and habitats on proposed projects and activities having potential impact on natural resources. Partnered with other organizations in legal efforts to protect wildlife in GGNRA and Pt Reyes National Seashore. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | true |
| IRS990/ElectionOfBoardMembersInd | 0 | true |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 920871 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 6376 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 6376 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 54986 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 54986 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 1338 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 8250 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 9588 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282FiledCnt | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 6.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 13.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 6.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 16.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 7.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 6.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | MARTHA JAROCKI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | ELYSE OMERNICK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ROBERT HINZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | DOUG WATERMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | ROGER HARRIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | LEILA LANCTOT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | EDWARD NUTE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ELLENA OCHOA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | LOWELL SYKES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | BARBARA SALZMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | JUDE STALKER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | MIKE ANDERSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | CLINT KELLNER |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | OUTREACH |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | MEMBERSHP CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | VP/RAIL EDITOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | CONSERVATION CH |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Secretary |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | PROPERTY MGT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | VOLUNTEER COORD |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Vice President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | SPECIAL PRJ CH |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | PROPERTY MGT |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1956 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | -2189 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 13 |
| IRS990/GovernmentGrantsAmt | 0 | 663652 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 72389 |
| IRS990/GrossReceiptsAmt | 0 | 1011561 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 13 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 10467 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 10467 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/TotalAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 65982 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 65982 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 1598145 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 1719125 |
| IRS990/IRPDocumentCnt | 0 | 5 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
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| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 4667993 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 4667993 |
| IRS990/LegalDomicileStateCd | 0 | CA |
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| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 46742 |
| IRS990/MembersOrStockholdersInd | 0 | true |
| IRS990/MethodOfAccountingCashInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | THE MARIN AUDUBON SOCIETY IS DEDICATED TO ACTIVE PARTICIPATION IN CONSERVATION, ENVIRONMENTAL EDUCATION, AND ENJOYMENT OF OUR NATURAL HERITAGE. WE ADVOCATE SOUND LAND AND WATER RESOURCE PLANNING, AND ACT TO RESTORE, ENHANCE, AND SAFEGUARD OUR WETLANDS AND OTHER NATURAL HABITATS. BIRDS AND OTHER WILDLIFE ARE THE INDICATORS OF THE HEALTH OR OUR ENVIRONMENT, AND WE REMAIN COMMITTED TO THEIR PROTECTION AND PRESERVATION. |
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| IRS990/NondeductibleContributionsInd | 0 | false |
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| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 831 |
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| IRS990/OperateHospitalInd | 0 | false |
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| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
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| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | PROPERTY MANAGEMENT EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 1 | Printing and Publications |
| IRS990/OtherExpensesGrp/Desc | 2 | Parcel Taxes |
| IRS990/OtherExpensesGrp/Desc | 3 | Program Expenses |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 7248 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 848763 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 17845 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 10900 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 8350 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 848763 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 25093 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 10900 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 8350 |
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| IRS990/PoliticalCampaignActyInd | 0 | false |
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| IRS990/PrincipalOfficerNm | 0 | BARBARA SALZMAN |
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| IRS990/ProgramServiceRevenueGrp/Desc | 0 | Education |
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| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | EDUCATION: Offered 63 field trips and 10 speaker series programs on birds and other natural history topics. Sponsored 3 Marin County Christmas Bird Counts. Published 10 newsletters, distributed electronically or by mail to our members. Newsletters included field trip reports, articles about climate change initiatives, and reports of our ongoing efforts to protect the environment. Also offered Community Service workdays for students working on habitat enhancement on our properties. |
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| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 6549 |
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| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
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| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 836276 |
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| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 63830 |
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| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.91130 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.90890 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 3531320 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 101512 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
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| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 752134 |
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| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 500752 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 836276 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 3632832 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 3875199 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
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| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
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| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | true |
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| IRS990ScheduleC/AvgGrassrootsNontaxableGrp/CurrentYearMinus1Amt | 0 | 30024 |
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| IRS990ScheduleC/AvgGrassrootsNontaxableGrp/CurrentYearMinus3Amt | 0 | 15253 |
| IRS990ScheduleC/AvgGrassrootsNontaxableGrp/TotalAmt | 0 | 117709 |
| IRS990ScheduleC/AvgLobbyingNontaxableAmountGrp/CurrentYearAmt | 0 | 175176 |
| IRS990ScheduleC/AvgLobbyingNontaxableAmountGrp/CurrentYearMinus1Amt | 0 | 120094 |
| IRS990ScheduleC/AvgLobbyingNontaxableAmountGrp/CurrentYearMinus2Amt | 0 | 114553 |
| IRS990ScheduleC/AvgLobbyingNontaxableAmountGrp/CurrentYearMinus3Amt | 0 | 61013 |
| IRS990ScheduleC/AvgLobbyingNontaxableAmountGrp/TotalAmt | 0 | 470836 |
| IRS990ScheduleC/AvgTotalLobbyingExpendGrp/CurrentYearMinus3Amt | 0 | 500 |
| IRS990ScheduleC/AvgTotalLobbyingExpendGrp/TotalAmt | 0 | 500 |
| IRS990ScheduleC/CorrectionMadeInd | 0 | false |
| IRS990ScheduleC/Form4720FiledInd | 0 | false |
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| IRS990ScheduleC/OtherExemptPurposeExpendGrp/FilingOrganizationsTotalAmt | 0 | 1001758 |
| IRS990ScheduleC/TotalExemptPurposeExpendGrp/FilingOrganizationsTotalAmt | 0 | 1001758 |
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