- Merit badge Worksheet for Nature from usscouts.org. It is a great place to organize your work
- Check out Mr. R's Nature Merit Badge Passport
- American Birding Association
- American Bird Conservancy
- American Museum of Natural History
- The Audubon Society
- Audubon magazine online
- BirdSource
- Patuxent Wildlife Research Center
- Florida Birding Hotspots
- Florida Birding
- Discover Magazine
- National Fish and Wildlife Foundation
- National Geographic Society
- National Park Service
- U.S. Fish and Wildlife Service
- How to identify insects (with scrapbook pages)
- Iowa State University Interactive Bug Guide
- American Zoo and Aquarium Association
- Bat Conservation International
- Conservation and Resource Center
- National Marine Fisheries Service
- National Wildlife Federation
- National Zoological Park
- The Nature Conservancy
- Wildlife Conservation Society
- Izaak Walton League of America
- Reptile and Amphibian Distribution by State
- Reptipage: FAQs - differences between reptiles and amphibians; between alligators and crocodiles; and between salamanders and lizards.
- Difference Between Frogs and Toads