Conservation Medicine
- Alliance of Veterinarians for the Environment
- American Association of Wildlife Veterinarians
- Animal & Human Health for the Environment and Development (AHEAD)
- California Condor Conservation
- Consortium for Conservation Medicine
- Envirovet Summer Institute
- Smithsonian-Mason Semester for Conservation Studies
- Tufts University Center for Conservation Medicine
- UGA Costa Rica Conservation Biology & Conservation Medicine Summer Program
- USGS National Wildlife Health Center
- Wildlife Conservation Society Field Veterinary Program
- Wildlife Disease Association
- Wildlife Trust Alliance
Conservation Organizations and Advocacy Groups
- American Bird Conservancy
- Avian Welfare Coalition
- BirdLife International
- EcoHealth
- Environmental Protection Agency
- International Union for the Conservation of Nature (IUCN)
- National Audubon Society
- National Wildlife Federation
- The Nature Conservancy
- North American Association for Environmental Education
- Parrots International
- RARE Conservation
- Seanet
- Sierra Club
- Southwestern Research Station
- Top 100 Forestry Resources
- US Fish and Wildlife Service
- Wildlife Conservation Society
- World Parrot Trust
- World Wildlife Fund
Birding and Natural History
- Audubon Annual Christmas Bird Count
- Bird Life International
- Birding.com
- Cornell Ornithology Laboratory
- Great Backyard Bird Count
- National Audubon Society
- International Union for Conservation of Nature and Natural Resources
- Wildlife Conservation Society
Think Green
- American Bird Conservancy: Cats Indoors! The Campaign for Safer Birds & Cats
- Breathing Earth
- COHAB
- Freecycle Network
- Green Thing
- Harvard Medical School: Center for Health and the Global Environment
- New American Dream
- The Daily Green