| Organizations performing similar types of work |
| Id | Name | Address | State | Established | Total Income |
|---|
| 1 | Nature Conservancy | 4245 North Fairfax Drive, Arlington, VA 22203-1637 | VA | 1954-03 | $2,812,102,385 |
| 2 | The Conservation Fund A Nonprofit Corporation | 1655 Fort Myer Dr Ste 1300, Arlington, VA 22209-3199 | VA | 1985-07 | $242,376,138 |
| 3 | National Audubon Society Inc | 225 Varick St Fl 7, New York, NY 10014-4396 | NY | 1972-11 | $137,653,793 |
| 4 | Natural Resources Defense Council Inc | 40 West 20th Street, New York, NY 10011-4211 | NY | 1970-03 | $133,129,192 |
| 5 | Sierra Club, Central Upper Peninsula Sierra Club | PO BOX 1065, Escanaba, MI 49829-1065 | MI | 1968-12 | $82,539,747 |
| 6 | Puerto Rico Conservation Trust | PO BOX 9023554, San Juan | international | 1969-12 | $80,000,000 |
| 7 | Sierra Club Foundation | 85 2nd St Ste 750, San Francisco, CA 94105-3465 | CA | 1962-06 | $70,215,762 |
| 8 | Massachusetts Audubon Society Inc | 208 South Great Rd Gordon Hall, Lincoln, MA 01773 | MA | 1951-08 | $65,376,299 |
| 9 | Iowa Natural Heritage Foundation | 505 5th Ave Ste 444, Des Moines, IA 50309-2321 | IA | 1979-09 | $26,530,163 |
| 10 | National Recreation & Park Association | 22377 Belmont Ridge Rd, Ashburn, VA 20148-4501 | VA | 1933-06 | $13,948,926 |
| 11 | Alaska Conservation Foundation | 441 W 5th Ave, Anchorage, AK 99501-2309 | AK | 1977-06 | $8,942,298 |
| 12 | New Jersey Audubon Society | 9 Hardscrabble Rd, Bernardsville, NJ 07924-1303 | NJ | 1937-04 | $8,748,252 |
| 13 | Sheriffs Meadow Foundation | Rr 1 Box 319x, Vineyard Hvn, MA 02568-9727 | MA | 1961-09 | $8,142,954 |
| 14 | The Connecticut Audubon Society Incorporated | 2325 Burr St, Fairfield, CT 06824-1806 | CT | 1942-08 | $7,392,713 |
| 15 | Nantucket Conservation Foundation Inc | PO BOX 13, Nantucket, MA 02554-0013 | MA | 1964-12 | $7,273,135 |
| 16 | Sanibel-Captiva Conservation Foundation Inc | PO BOX 839, Sanibel, FL 33957-0839 | FL | 1968-07 | $6,791,885 |
| 17 | Bhutan Trust Fund For Enviromental Conservation | Thimphu, Bhutan | international | 1997-01 | $6,333,159 |
| 18 | North Carolina Coastal Federation Inc | 3609 Hwy 24 Ocean, Newport, NC 28570 | NC | 1983-01 | $5,104,250 |
| 19 | Izaak Walton League Of America Inc, The Argos Chapter Izaak Walton League Of America | Po Box 51, Argos, IN 46501 | IN | 1985-04 | $4,139,679 |
| 20 | Audubon Society Of Rhode Island | 12 Sanderson Rd, Smithfield, RI 02917-2606 | RI | 1943-01 | $3,752,018 |
| 21 | The Mountains To Sound Greenway Tr | 911 Western Ave Ste 203, Seattle, WA 98104-1031 | WA | 1996-11 | $1,883,003 |
| 22 | Portland Audubon Society | 5151 Nw Cornell Rd, Portland, OR 97210-1081 | OR | 1947-12 | $2,812,920 |
| 23 | Oregon Wild | 5825 N Greeley Ave, Portland, OR 97217-4145 | OR | 1975-04 | $1,736,423 |
| 24 | Intertribal Timber Council | 1112 Ne 21st Avenue, Portland, OR 97232-2595 | OR | 1996-01 | $741,008 |
| 25 | Central Oregon Environmental Center Inc | 16 Nw Kansas Ave, Bend, OR 97701-3202 | OR | 1993-05 | $469,622 |
| 26 | Ore-Cal Resource Conservation And Development Area Council | 409 Pine St, Klamath Falls, OR 97601-6020 | OR | 1994-08 | $445,748 |
| 27 | Cascadia Wildlands | PO BOX 10455, Eugene, OR 97440-2455 | OR | 2001-07 | $232,329 |
| 28 | Izaak Walton League Of America Inc | Po Box 891, Eugene, OR 97440-0891 | OR | 1985-04 | $55,744 |
| 29 | Lane County Audubon Society | PO BOX 5086, Eugene, OR 97405-0086 | OR | 1997-04 | $19,319 |
| 30 | Central Oregon Audubon Chapter, East Cascades Audubon Society East Cascades Bird Conservancy | P O Box 565, Bend, OR 97709 | OR | 1974-07 | $16,766 |
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