| Bureau of Land Management | Federal |
| Bureau of Indian Affairs | Federal |
| Bryn Mawr College | Academic Institution |
| Brown University | Academic Institution |
| Bridgewater State University | Academic Institution |
| Boston University | Academic Institution |
| Boise State University | Academic Institution |
| Blackfeet Community College | Academic Institution |
| Black Hills State University | Academic Institution |
| Bishop Museum | Non-Profit Organization |
| Bird Conservancy of the Rockies | Non-Profit Organization |
| Biodiversity Research Institute | Non-Profit Organization |
| Baylor University | Academic Institution |
| Bates College | Academic Institution |
| Barry University | Academic Institution |
| Avian Research and Conservation Institute | Non-Profit Organization |
| Audubon of South Carolina | Non-Profit Organization |
| Audubon of North Carolina | Non-Profit Organization |
| Audubon of Florida | Non-Profit Organization |
| Auburn University | Academic Institution |
| Arizona-Sonora Desert Museum | Non-Profit Organization |
| Arizona State University | Academic Institution |
| Arizona Game and Fish Department | Other |
| Archaeology Southwest (formerly Center for Desert Archaeology) | Non-Profit Organization |
| American Turtle Observatory | Non-Profit Organization |
