Science Resources: Animals
- American Anti-Vivisection Society Recommended by C&RL News
- The American Humane Association Recommended by C&RL News
- American Society for the Prevention of Cruelty to Animals (ASPCA) Recommended by C&RL News
- Animal Diversity Web
- Animal Legal Defense Fund Recommended by C&RL News
- Animal Rights International Recommended by C&RL News
- Animal Welfare Information Center of the U.S. Department of Agriculture National Agriculture Library Recommended by C&RL News
- Animal Welfare Institute Recommended by C&RL News
- Aquatic Commons Rated by Choice Magazine as: Recommended
- Audubon's Birds of America at the University of Pittsburgh Rated by Choice Magazine as : Highly recommended
- Best Friends Animal Society Recommended by C&RL News
- Center for Biological Diversity Rated by Choice Magazine as: Recommended
- Compassion in World Farming Recommended by C&RL News
- Compassionate Action for Animals Recommended by C&RL News
- Dogs Deserve Better Recommended by C&RL News
- Doris Day Animal League Recommended by C&RL News
- Endangered Species International Rated by Choice Magazine as: Recommended
- Farm Animal Rights Movement Recommended by C&RL News
- Farm Sanctuary Recommended by C&RL News
- Freshwater and Marine Image Bank Rated by Choice Magazine as: Recommended
- Global Amphibian Assessment (GAA)
- Humane Society of the United States Recommended by C&RL News
- Humane USA Recommended by C&RL News
- In Defense of Animals Recommended by C&RL News
- Internet Bird Collection Rated by Choice Magazine as: Recommended
- IUCN Red List of Threatened Species Rated by Choice Magazine as: Highly recommended
- Longevity Records: Life Spans of Mammals, Birds, Amphibians, Reptiles, and Fish Rated by Choice Magazine as : Highly recommended
- MarineBio.org Rated by Choice Magazine as: Recommended
- National Audubon Society Recommended by C&RL News
- NatureServe
- NBII: Wildlife Disease Information Node Rated by Choice Magazine as: Highly recommended
- NOAA Habitat Conservation Rated by Choice Magazine as: Highly recommended
- OBIS: Ocean Biogeographic Information System Rated by Choice Magazine as : Recommended
- PETA-People for the Ethical Treatment of Animals Recommended by C&RL News
- Peterson Field Guide Rated by Choice Magazine as: Highly recommended
- PrimateLit Rated by Choice Magazine as: Highly recommended
- Species 2000: Taxonomy of Animals Rated by Choice Magazine as : Recommended
- USDA Animal Welfare Information Center Rated by Choice Magazine as an Outstanding Academic Title, 2010
- Western Soundscape Archive Rated by Choice Magazine as: Highly recommended
- WildFinder: Mapping the World's Species Rated by Choice Magazine as : Essential
- World Animal Net (Directory) Recommended by C&RL News
- World Wildlife Fund (WWF) Recommended by C&RL News