| National Audubon Society | DC |
| Animal Welfare Institute | DC |
| Center for Biological Diversity | DC |
| US PIRG | DC |
| DC Natives | DC |
| Society for Conservation Biology | DC |
| Marine Fish Conservation Network | DC |
| Creation Justice Ministries | DC |
| Audubon Society of the District of Columbia | DC |
| League of Women Voters of the US | DC |
| Earth Day Network | DC |
| Earthjustice | DC |
| Environmental Defense Fund | DC |
| Wildlands Network | DC |
| Environment America | DC |
| Friends of the Earth | DC |
| Church & Society, The United Methodist Church | DC |
| Greenpeace USA | DC |
| NRDC | DC |
| Union of Concerned Scientists | DC |
| Humane World Action Fund | DC |
| Humane World for Animals | DC |
| International Fund for Animal Welfare | DC |
| Larch Company | DC |
| Oceana | DC |
| League of Conservation Voters | DC |
| Wilderness Society | DC |
| Physicians for Social Responsibility | DC |
| Delaware Ecumenical Council | DE |
| Delaware Center for Inland Bays | DE |
| American Association of Zoo Veterinarians | FL |
| Florida Audubon | FL |
| 1000 Friends of Florida | FL |
| Coastal Plains Institute | FL |
| Conservancy of Southwest Florida | FL |
| Sea Turtle Conservancy | FL |
| Gasparilla Island Conservation | FL |
| Florida Conservation Voters | FL |
| Gulf Specimen Marine Lab | FL |
| Save The Manatee | FL |
| Zoological Association of America | FL |
| Pelican Island Audubon Society | FL |
| Key Deer Protection Alliance | FL |
| Key West Wildlife Center | FL |
| Marine Resources Council | FL |
| Atlanta Audubon Society | GA |
| Chattooga Conservancy | GA |
| Georgia Highlands College | GA |
| Georgia Native Plant Society | GA |
| American Reef Coalition | HI |
| Conservation Council for Hawai'i | HI |
| R Mason Fine Arts | HI |
| HabitatYou | IA |
| Iowa Wildlife Federation | IA |
| Advocates for the West | ID |
| Western Watersheds Project | ID |
| Idaho Conservation League | ID |
| Wolf Recovery Foundation | ID |
| Western Watersheds Project | ID |
| Endangered Small Animal Conservation Fund | IL |
| Environmental Defenders of McHenry County | IL |
| Cosley Zoo | IL |
| Difference Makers Media | IL |
| John G. Shedd Aquarium | IL |
| Alliance for the Great Lakes | IL |
| Trout Unlimited (Oak Brook Chapter) | IL |
| Illinois Humane | IL |
| Lutheran School of Theology at Chicago | IL |
| Heartwood | IN |
| Hoosier Environmental Council | IN |
| Indiana Forest Alliance | IN |
| Herpetologists' League | KS |
| American Society of Mammalogists | KS |
| Northern Flint Hills Audubon Society | KS |
| Michoacan Reforestation Fund | KS |
| Appalachia Science in the Public Interest | KY |
| Bowling Green-Warren County Humane Society | KY |
| Kentucky Heartwood | KY |
| Black Bear Conservation Coalition | LA |
| Gulf Restoration Network | LA |
| Pelecanus Inc | Long Beach, CA |
| Whale and Dolphin Conservation - North America | MA |
| Whale Conservation Institute | MA |
| Berkshire Environmental Action Team (BEAT) | MA |
| Wolf Hollow | MA |
| Ocean Alliance | MA |
| Environment Action | MA |
| Earth Action | MA |
| EarthAction | MA |
| Pegasus Foundation | MA |
| World Society for the Protection of Animals | MA |
| Vernal Pool Association | MA |
| Wildlife Rehabilitators Association of Massachusetts | MA |
| Massachusetts Audubon Society | MA |
| Appalachian Mountain Club | MA |
| Massachusetts Society for the Prevention of Cruelty to Animals | MA |
| Cosmic Sister | MA |
| Zoo New England | MA |
| New England Wildflower Society | MA |
| Anacostia Watershed Society | MD |
