- Animal Diversity Web - Searchable database created by the University of Michigan.
- Animal Omnibus - Lists of links to thousands of animals.
- Animal Information Database - Lots of info about sea animals, including pictures, classification, habitat and physical characteristics.
- Critter Cam! - What do animals do when there are no people around to see them? View animals in Antarctica, the Arctic, and the deep sea, from National Geographic.
- eNature.com - Field guide to 5,500 plants and animals.
- Science & Nature: Animals - A great site to get you started with info from prehistoric times to endangered species.
- Endangered Species - World Wildlife Fund lists of endangered animals. Lots of info
- Endangered Plants and Animals - Information from the U.S. Department of Fish and Wildlife Service
- Fun Facts about the Arctic - Facts, pictures and activities about Arctic wildlife
- Insects.org - Searchable database of insects. Basic information and close-up pictures
- Shedd Aquarium - The world's largest! Interactive sites, learn about fish, mammals and reefs
- Dinosauria - Find out what dinosaurs ate, look at fossils, read about dinosaur nests.
- Meet the Dinosaurs - Informative site that includes timelines, graphics, theories about extinction.
- Prehistoric Life - This BBC site contains pictures, interactive games and quizzes.
- Zoom Dinosaurs - Basic information for younger children