| People and Pollinators Action Network | CO |
| Performing Animals Welfare Society | CA |
| Physicians for Social Responsibility | DC |
| Pike Assoc/Born Free USA | DC |
| Pilchuck Audubon Society | WA |
| Planning and Conservation League & PCL Foundation | CA |
| Potomac Valley Audubon Society | WV |
| Predator Defense | OR |
| Presbyterians for Earth Care | NC |
| Primate Conservation Inc. | RI |
| Project Coyote | CA |
| Public Employees for Environmental Responsibility | MD |
| Quality Parks | NY |
| R Mason Fine Arts | HI |
| Rainforest Action Network | CA |
| Raptor Research Foundation | WA |
| Red Panda Network | OR |
| Resource Renewal Institute | CA |
| Restore Point Reyes Seashore | CA |
| Restore the North Woods | ME |
| Riverhead Foundation | NY |
| Rock Creek Conservancy, Inc. | MD |
| Rockbridge Area Conservation Council | VA |
| Rocky Mountain Wild | CO |
| Rogue Valley Audubon Society | OR |
| Rumpf Law Offices | WI |
| San Bruno Mountain Watch | CA |
| sandiegoeco.org | CA |
| SandyHook SeaLife Foundation | NJ |
| Santa Barbara Urban Creeks Council | CA |
| Santa Fe Presbyterian Church | OK |
| Save America's Forests | DC |
| Save Our Allegheny Ridges | PA |
| Save Our Allegheny Ridges | PA |
| Save Our Sky Blue Waters | MN |
| Save Our Wild Salmon | WA |
| SAVE THE FROGS! | CA |
| Save The Manatee | FL |
| Sea Shepherd Legal | WA |
| Sea Turtle Conservancy | FL |
| Seattle Audubon Society | WA |
| Shark Stewards | CA |
| Sierra Club | DC |
| Sierra Club John Muir | WI |
| Sierra Club, Missouri Chapter | MO |
| Sierra Forest Legacy | CA |
| Siskyou Project | TX |
| Sky Island Alliance | AZ |
| Society and Animals Forum | MD |
| Society for Conservation Biology | DC |
| Society for the Protection of Insects | CA |
| South Carolina Wildlife Federation | SC |
| South Shore Audubon Society | NY |
| Southern Environmental Center | AL |
| Southern Maryland Audubon Society | MD |
| Southern Resident Killer Whale Chinook Salmon Initiative | WA |
| Southern Utah Wilderness Alliance | UT |
| Southwestern Wisconsin Area Progressives (SWWAP) | WI |
| Species Unite | NY |
| Strong Foundation for Environmental Ethics | CA |
| Tahoma Audubon | WA |
| Tennessee Citizens for Wilderness Planning | TN |
| Texas Conservation Alliance | TX |
| The Activism Center at Wetlands Preserve | NY |
| The Caterpillar Lab | NH |
| The Conservation Agency | RI |
| The Conservation Angler | OR |
| The Earth Island Institute | CA |
| The Endangered Species Conservation Site | CA |
| The Fund for Wild Nature | CA |
| The Lands Council | WA |
| The Otter Project | CA |
| The Union for Reform Judaism | NY |
| The Urban Wildlands Group | CA |
| The Wildlife Society | MD |
| Tortoise Group | NV |
| Trevor Zoo | NY |
| Trout Unlimited | VA |
| Trout Unlimited (Oak Brook Chapter) | IL |
| Trout Unlimited Virginia | VA |
| Tucson Audubon Society | AZ |
| Tuolumne River Preservation Trust | CA |
| Turner Endangered Species Fund | MT |
| Turtle Island Restoration Network | CA |
| Union of Concerned Scientists | DC |
| Unitarian Universalist Ministry for Earth | OR |
| Unitarian Universalists for the Ethical Treatment of Animals | VT |
| United Church of Christ EcoAction | TX |
| United Plant Savers | VA |
| Upper Missouri Breaks Audubon Society | MT |
| US PIRG | DC |
| Vermont Audubon Society | VT |
| Vernal Pool Association | MA |
| Vet Voice Foundation | OR |
| Virginia Forest Watch | VA |
| Virginia Herpetological Society | VA |
| Virginia Society of Ornithology | VA |
| VOICE for Animals | ME |
| Voices of Wildlife in NH | NH |
| Walker Lake Working Group | NV |
