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Organization	Location	Revenue	Expenses	Assets	Program	Fundr. cost	Employees	Type
Point Reyes Bird Observatory The organization's mission is to conserve birds, other wildlife and ecosystems through scientific research… 94-1594250 · FY2024	Petaluma, CA	$31.7M	$28.6M	$26.4M	81%	5%	143	501(c)(3)
Rocky Mountain Bird Observatory Our mission is to conserve birds and their habitats through an integrated approach of science, education and… 84-1079882 · FY2024	Brighton, CO	$10.1M	$9.2M	$7.7M	87%	2%	168	501(c)(3)
Hawk Mountain Sanctuary Association Study & conservation of raptors; education of young scientists & the public in conservation science. 23-1392700 · FY2024	Kempton, PA	$7.6M	$3.5M	$33.1M	80%	12%	47	501(c)(3)
Environment for the Americas INC The organization works to increase awareness of birds and their conservation throughout the western… 20-5844470 · FY2024	Boulder, CO	$7.0M	$6.4M	$944.2K	96%	1%	10	501(c)(3)
Friends of Birdlife International INC Support for the prevention of extinction of bird species. 30-0265343 · FY2024	New York, NY	$5.4M	$4.8M	$6.6M	97%	1%	3	501(c)(3)
Playa Lakes Joint Venture Wetland and Prairie Bird Conservation 84-1623284 · FY2024	Longmont, CO	$3.6M	$3.4M	$1.6M	93%	0%	9	501(c)(3)
Great Basin Bird Observatory Dedicated to the conservation of birds and their habitats in the GREAT BASIN and the northern mojave desert. 86-0852927 · FY2024	Reno, NV	$2.6M	$2.7M	$1.0M	91%	0%	85	501(c)(3)
American Ornithological Society Advancing the scientific knowledge and conservation of birds 72-6019246 · FY2024	Chicago, IL	$2.3M	$1.7M	$34.7M	78%	0%	8	501(c)(3)
San Francisco Bay Bird Observatory The San Francisco Bay Bird Observatory uses science to conserve birds and habitats. Our avian monitoring and… 94-2788588 · FY2024	San Jose, CA	$2.0M	$1.5M	$917.1K	84%	7%	25	501(c)(3)
Gulf Coast Bird Observatory INC We fulfill our mission of protecting birds and their habitats by using sound scientific research, land… 76-0553113 · FY2024	Lake Jackson, TX	$1.2M	$970.7K	$3.5M	85%	5%	5	501(c)(3)
Michigan Audubon Society Connect birds and people for the benefit of both through conservation, education, and research. 38-1686621 · FY2025	Okemos, MI	$1.2M	$1.1M	$7.0M	61%	9%	17	501(c)(3)
World of Birds Show To further the education of the public concerning wildlife and the conservation of wildlife 41-1806527 · FY2024	Winter Haven, FL	$886.7K	$877.4K	$221.2K	100%	0%	—	501(c)(3)
Tune in to Nature Org Birds Connect us with the joy and wonder of nature. By telling vivid, sound-rich stories about birds and the… 20-5904919 · FY2024	Asheville, NC	$870.6K	$1.1M	$934.1K	62%	22%	8	501(c)(3)
Black Swamp Bird Observatory To inspire the appreciation, enjoyment and conservation of birds and their habitats through research… 34-1702076 · FY2024	Oak Harbor, OH	$866.9K	$818.2K	$1.4M	72%	10%	10	501(c)(3)
Discover Klamath Visitor & Convention Bureau DISCOVER KLAMATH promotes tourism assets such as parks, trails, museums, national park units, and more, with… 26-4038270 · FY2024	Klamath Falls, OR	$821.7K	$885.6K	$1.0M	86%	0%	5	501(c)(3)
George Miksch Sutton Avian Research Center INC The organization promotes conservation, education, and RESEARCH of endangered, rare, and understudied birds. 73-1023595 · FY2023	Bartlesville, OK	$775.0K	$1.6M	$5.1M	86%	4%	26	501(c)(3)
Kilauea Point Natural History Association The organization promotes better understanding, appreciation, and conservation of the NATURAL HISTORY and… 99-0226697 · FY2023	Kilauea, HI	$754.4K	$647.1K	$689.9K	81%	7%	11	501(c)(3)
The Purple Martin Conservation Association The organization is dedicated to the CONSERVATION of the PURPLE MARTIN bird species through scientific… 25-1555430 · FY2024	Erie, PA	$690.9K	$524.6K	$1.4M	82%	2%	10	501(c)(3)
Kansas Association for Conservation and Environmental Education Fostering knowledge and awareness of the conservation of natural resources in Kansas. 48-0850919 · FY2024	Manhattan, KS	$570.8K	$494.5K	$157.3K	82%	0%	16	501(c)(3)
Lake Michigan Bird Observatory INC Conservation of birds and bats in the western Great Lakes region of the United States. 82-2924873 · FY2024	Prt Washingtn, WI	$557.0K	$370.2K	$328.3K	74%	15%	4	501(c)(3)
Hawk Ridge Bird Observatory INC The mission of Hawk Ridge Bird Observatory is to protect birds of prey and other migratory birds in the… 76-0746366 · FY2024	Duluth, MN	$449.7K	$380.8K	$628.3K	74%	0%	18	501(c)(3)
Raptor Education Group INC Promote awareness & respect for native bird species, behaviors, and habitats. Develope & promote… 39-1772318 · FY2024	Antigo, WI	$431.5K	$542.1K	$1.3M	89%	4%	26	501(c)(3)
Missouri River Bird Observatory Conservation of birds, other wildlife, and their habitats via science, education, and advocacy 27-2746275 · FY2024	Marshall, MO	$415.8K	$484.2K	$951.3K	85%	1%	16	501(c)(3)
Salt Pond Areas Bird Sanctuaries INC Acquire and preserve natural AREAS for the protection of wildlife, education, scientific study and aesthetic… 04-6125554 · FY2024	W Falmouth, MA	$377.2K	$363.2K	$6.9M	92%	0%	4	501(c)(3)
Maine Natural History Observatory NATURAL HISTORY observation 20-0718450 · FY2024	Gouldsboro, ME	$348.5K	$273.7K	$268.1K	88%	0%	4	501(c)(3)
Detroit Bird Alliance To foster appreciation and conservation of birds and the environment we share through education, research… 38-6004962 · FY2024	Detroit, MI	$297.4K	$295.2K	$337.0K	54%	11%	3	501(c)(3)
Coastal Virginia Wildlife Observatory Protecting WILDLIFE through field research, education and habitat conservation 54-1712549 · FY2023	Lightfoot, VA	$291.9K	$38.6K	$630.9K	92%	5%	—	501(c)(3)
Grassland Bird Trust INC Gbt protects critical and vanishing GRASSLAND habitat for endangered and threatened GRASSLAND birds. Gbt's… 27-4846966 · FY2024	Schuylerville, NY	$278.2K	$216.0K	$992.9K	91%	1%	1	501(c)(3)
Texas Ornithological Society Promote bird habitats 74-6063782 · FY2024	Corp Christi, TX	$258.7K	$211.0K	$1.7M	100%	0%	—	501(c)(3)
Erie Bird Observatory To provide avian research, education and conservation along the Pennsylvania shoreline of Lake Erie. 82-4134595 · FY2024	Erie, PA	$255.0K	$192.0K	$138.5K	96%	0%	15	501(c)(3)
Klamath Outdoor Science School To inspire a deep appreciation for natural resources community, and the arts through hands-on OUTDOOR… 71-0958638 · FY2024	Klamath Falls, OR	$250.7K	$290.4K	$447.4K	73%	0%	16	501(c)(3)
Urban Bird Collective Charitable: Birdwatching and nature walks with selected organizations and populations advancement of… 84-3935254 · FY2025	Saint Paul, MN	$168.9K	—	$258.1K	—	—	1	501(c)(3)
Kansas Water Pollution Control Association Scientific and educational organization 48-0935297 · FY2024	Topeka, KS	$153.7K	$97.3K	$343.8K	100%	0%	—	501(c)(3)
Southeastern Arizona Bird Observatory Incorporated Conservation of birds of SE Arizona adn their habitat. 86-0842671 · FY2025	Bisbee, AZ	$124.6K	$104.8K	$591.6K	76%	0%	3	501(c)(3)
Cape Fear Bird Observatory INC CAPE FEAR BIRD observation INC. Mission strives to promote conservation of birds and their habitats in north… 85-3141289 · FY2025	Wilmington, NC	$101.3K	$116.9K	$32.4K	100%	0%	—	501(c)(3)
Audubon Society of Omaha Promote environmental awareness through education emphasizing birds 47-0597232 · FY2024	Omaha, NE	$91.1K	$63.7K	$1.4M	70%	0%	—	501(c)(3)
Pilchuck Audubon Society Conserve and restore natural ecosystems, public education, field trips, and monitoring programs. 91-6183664 · FY2024	Snohomish, WA	$86.7K	$116.7K	$642.1K	74%	5%	1	501(c)(3)
Osa Birds Research and Conservation INC 45-5632959 · FY2020	San Diego, CA	$64.8K	—	$0	—	—	—	501(c)(3)
Saving Birds Thru Habitat Native bird HABITAT restoration. 38-3626179 · FY2024	Omena, MI	$37.2K	—	$0	—	—	2	501(c)(3)

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Public data from IRS Form 990 e-file & Business Master File. A 990 shows reported financial activity, not measured program outcomes. Assets are from the IRS BMF and may lag the latest filing; fundraising cost is fundraising expenses as a share of total expenses. · philanthropy.org