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Private foundations don’t post open calls, so nobody can search them. We read IRS filings instead — 9.6 million grants from 174,053 foundations and grantmaking charities, searchable by what the money was actually for.

12 funders with a record of paying for “migratory”

Where the money went

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Platte River Whooping Crane Critical → Platte River Whooping Crane Maintenance Trust Inc: $2.2M across 3 grants, latest 2024The Volgenau Foundation → The Nature Conservancy of California: $1.2M across 2 grants, latest 2023Walton Family Foundation Inc → Theodore Roosevelt Conservation Partnership Inc: $777K across 2 grants, latest 2024Tareen Filgas Foundation → American Bird Conservancy: $600K across 3 grants, latest 2024National Fish and Wildlife Foundation → Chicago Park District: $236K across 1 grant, latest 2023Higgins Foundation → Florida Keys Wild Bird Rehab Center: $150K across 3 grants, latest 2024Research Corporation Dba Research → University of Oklahoma: $50K across 2 grants, latest 2024The Henry M Paulson Jr Institute → Spoon-Billed Sandpiper (Shanghai) Environment Protection Technology Co Ltd: $48K across 2 grants, latest 2023Louis Foundation → Florida Keys Wild Bird Center: $40K across 2 grants, latest 2024Natureworks Inc → George Miksch Sutton Avian Re: $35K across 2 grants, latest 2023Dominion Energy Charitable Foundation → Shaker Lakes Regional Nature Center: $11K across 2 grants, latest 2023John T & Betty Ann Lewis Foundation → Florida Wildlife Hospital and Sanctuary: $4K across 2 grants, latest 2024The Volgenau Foundation → The Nature Conservancy of Virginia: $275K across 2 grants, latest 2024National Fish and Wildlife Foundation → Wyoming Game and Fish Department: $211K across 1 grant, latest 2023Research Corporation Dba Research → Tulane University: $27K across 2 grants, latest 2024Natureworks Inc → George Miksch Sutton Avian Research: $16K across 1 grant, latest 2024Dominion Energy Charitable Foundation → Audubon North Carolina: $7K across 1 grant, latest 2023John T & Betty Ann Lewis Foundation → Florida Wildlife Hospital and Santuary: $3K across 1 grant, latest 2025The Volgenau Foundation → The Nature Conservancy in Virginia: $100K across 1 grant, latest 2022National Fish and Wildlife Foundation → Five Valleys Land Trust: $75K across 1 grant, latest 2022National Fish and Wildlife Foundation → Crossroads at Big Creek Inc: $38K across 1 grant, latest 2023Platte River Whooping Crane Critical: $2.2M on this topic. Open the funder.Platte River Whooping Crane C…$2.2MThe Volgenau Foundation: $1.6M on this topic. Open the funder.The Volgenau Foundation$1.6MWalton Family Foundation Inc: $777K on this topic. Open the funder.Walton Family Foundation Inc$777KTareen Filgas Foundation: $600K on this topic. Open the funder.Tareen Filgas Foundation$600KNational Fish and Wildlife Foundation: $560K on this topic. Open the funder.National Fish and Wildlife Fo…$560KHiggins Foundation: $150K on this topic. Open the funder.Higgins Foundation$150KResearch Corporation Dba Research: $77K on this topic. Open the funder.Research Corporation Dba Rese…$77KNatureworks Inc: $51K on this topic. Open the funder.Natureworks Inc$51KThe Henry M Paulson Jr Institute: $48K on this topic. Open the funder.The Henry M Paulson Jr Instit…$48KLouis Foundation: $40K on this topic. Open the funder.Louis Foundation$40KDominion Energy Charitable Foundation: $18K on this topic. Open the funder.Dominion Energy Charitable Fo…$18KJohn T & Betty Ann Lewis Foundation: $7K on this topic. Open the funder.John T & Betty Ann Lewis Foun…$7KPlatte River Whooping Crane Maintenance Trust Inc: received $2.2M on this topicPlatte River Whooping Crane Mai…$2.2MThe Nature Conservancy of California: received $1.2M on this topicThe Nature Conservancy of Calif…$1.2MTheodore Roosevelt Conservation Partnership Inc: received $777K on this topicTheodore Roosevelt Conservation…$777KAmerican Bird Conservancy: received $600K on this topicAmerican Bird Conservancy$600KThe Nature Conservancy of Virginia: received $275K on this topicThe Nature Conservancy of Virgi…$275KChicago Park District: received $236K on this topicChicago Park District$236KWyoming Game and Fish Department: received $211K on this topicWyoming Game and Fish Department$211KFlorida Keys Wild Bird Rehab Center: received $150K on this topicFlorida Keys Wild Bird Rehab Ce…$150KThe Nature Conservancy in Virginia: received $100K on this topicThe Nature Conservancy in Virgi…$100KFive Valleys Land Trust: received $75K on this topicFive Valleys Land Trust$75KUniversity of Oklahoma: received $50K on this topicUniversity of Oklahoma$50KSpoon-Billed Sandpiper (Shanghai) Environment Protection Technology Co Ltd: received $48K on this topicSpoon-Billed Sandpiper (Shangha…$48KFlorida Keys Wild Bird Center: received $40K on this topicFlorida Keys Wild Bird Center$40KCrossroads at Big Creek Inc: received $38K on this topicCrossroads at Big Creek Inc$38KGeorge Miksch Sutton Avian Re: received $35K on this topicGeorge Miksch Sutton Avian Re$35KTulane University: received $27K on this topicTulane University$27KGeorge Miksch Sutton Avian Research: received $16K on this topicGeorge Miksch Sutton Avian Rese…$16KShaker Lakes Regional Nature Center: received $11K on this topicShaker Lakes Regional Nature Ce…$11KAudubon North Carolina: received $7K on this topicAudubon North Carolina$7KFlorida Wildlife Hospital and Sanctuary: received $4K on this topicFlorida Wildlife Hospital and S…$4KFlorida Wildlife Hospital and Santuary: received $3K on this topicFlorida Wildlife Hospital and S…$3K
12 funders, 21 recipients, grants matching “migratory” only. Ribbon width is proportional to the total given; each funder has its own colour (smaller funders in gray). Hover a name to isolate its flows, click a funder to open it. Drag to move around; zoom with the buttons, a double-click, or the wheel after clicking the map.

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Source: IRS Form 990-PF Part XV and Form 990 Schedule I, tax years 20192025. These are grants already paid, a record of what an organization funds rather than an open call. Private foundations rarely accept unsolicited applications and the route in is usually a program officer; grantmaking charities and associations more often run real application cycles, so check their website. How this data is built, and its limits →