| Audubon Vermont | VT |
| Audubon Texas | TX |
| Audubon Society of the District of Columbia | DC |
| Audubon Society of Rhode Island | RI |
| Audubon Society of Portland | OR |
| Audubon Society of New Hampshire | NH |
| Audubon Society of Central Maryland | MD |
| Audubon | DC |
| Atlanta Audubon Society | GA |
| Association of Zoos and Aquariums | MD |
| Arkansas Wildlife Federation | AR |
| Arkansas Renewable Resources Council | TX |
| Appalachian Mountain Club | MA |
| Appalachia Science in the Public Interest | KY |
| Apex Protection Project | CA |
| Animal Wonders Kansas City | MO |
| Animal Welfare Institute | DC |
| Animal Defenders International | CA |
| Animal and Society Institute | MI |
| Andropogon Associates, Inc. | PA |
| Anacostia Watershed Society | MD |
| American Society of Mammalogists | KS |
| American Rivers | DC |
| American Reef Coalition | HI |
| American Public Garden Association | PA |
| American Ornithologists' Union | VA |
| American Humane Association | DC |
| American Hiking Society | MD |
| American Conservation Film Festival | WV |
| American Cetacean Society | CA |
| American Bird Conservancy | DC |
| American Association of Zoo Veterinarians | FL |
| Alliance for the Wild Rockies | MT |
| Alliance for the Great Lakes | IL |
| Allegheny-Blue Ridge Alliance | VA |
| Alaska Wildlife Alliance | AK |
| Alaska Wilderness League | DC |
| Alabama Environmental Council | AL |
| African People & Wildlife | NJ |
| Advocates for the West | ID |
| Action for Animals | WA |
| Acterra | CA |
| A-Team for Wildlife | CA |
| A World Institute for Sustainable Humanity | WA |
| A LION'S HEART | Pays de la Loire |
| 1000 Friends of Florida | FL |
