Animal Diversity Web (ADW [ http://animaldiversity.ummz.umich.edu ]
Encyclopedia of animals. Articles cover animals' natural history, distribution, classification, and conservation biology. University of Michigan site offers thousands of animal species profiles with photos, illustrations, and sound clips.

NatureServe [ http://www.natureserve.org ]
NatureServe and its network of natural heritage programs serve as a source for information about rare and endangered species and threatened ecosystems.

eNature [ http://www.enature.com ]
Destination for nature lovers, outdoor enthusiasts, and environmentalists. eNature offers animal and plant field guides, habitat guides, news, and community tools.

Animaland [ http://www.animaland.org ]
ASPCA's fun site all about animals and pets, where kids can read about incredible animals, play games, learn about animal careers, and have questions answered by a macaw.

JungleWalk [ http://www.junglewalk.com ]
Classified and annotated compilation of animal video and audio clips on the web, with links to animal posters, books, and videos

Animal Pictures Archive [ http://www.animalpicturesarchive.com ]
Submit your photos or just browse the Animal Pictures Archive, offering a gallery of animal-related photos, sounds, and movies searchable by animal common names or scientific names.

Buglife: The Invertebrate Conservation Trust [ http://www.buglife.org.uk ]
Actively engaged in saving Britain's rarest bugs, slugs, snails, bees, wasps, ants, spiders, beetles, and many more fascinating invertebrates.

Fauna Europaea [ http://www.faunaeur.org ]
Explore the Fauna Europaea database, a database of the scientific names and distribution of all living European land and fresh-water animals

Farm Animals [ http://www.kidsfarm.com/farm.htm ]
For children to learn about farm and wild animals. With animal sounds, illustrations, and photographs

ZooBorns [ http://www.zooborns.com ]
Blog showcasing pictures and video clips of the newest and cutest exotic animal babies from zoos and aquariums around the world.

Animal Info [ http://www.animalinfo.org ]
Offers information on the biology and ecology of various species as well as current status of rare and endangered mammals. Also provides an individual species index sorted by common and scientific name.

Comparative Mammalian Brain Collections [ http://www.brainmuseum.org ]
Major national resources for the study of brain anatomy.

Mammal Society [ http://www.abdn.ac.uk/mammal ]
Gives voice to British mammals featuring odd-toed ungulates, fact sheets, puzzles, and whale feeding. Learn about Britain's favorite rodent

Animal Corner [ http://www.animalcorner.co.uk ]
Find information about mammals, birds, insects, marine life, and reptiles. Includes history, scientific classification, and animal conservation.

WhoZoo [ http://www.whozoo.org ]
Pictures and information about animals that can be seen at the Fort Worth Zoo.

Field and Swamp: Animals and Their Habitats [ http://www.dpughphoto.com ]
Features photographs with information of the habitats of animals including birds, insects, reptiles, mammals, and spiders in North Carolina.

Animal Names [ http://www.animalnames.net ]
Dictionary of animal species, complete with short description for each animal.

Ultimate Ungulate Page [ http://www.ultimateungulate.com ]
Guide to the world's hoofed mammal species.

Paleocene Mammals of the World [ http://www.paleocene-mammals.de ]
An introduction to the first 10 million years of the age of mammals. Learn about these early mammals: multituberculates, marsupials, condylarths, and species that resembled primates and insectivores

Mammal Research Institute - Polish Academy of Sciences [ http://bison.zbs.bialowieza.pl ]