• Animal Diversity Web (ADW)
  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.
  
• eNature
  Destination for nature lovers, outdoor enthusiasts, and environmentalists. Offers field guides, habitat guides, news, and community.
  
• Animaland
  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.
  
• Buzzle.com: Animals and Pets
  Offering articles, resources, and information related to animals and pets.
  
• JungleWalk
  Classified and annotated compilation of animal video and audio clips on the web, with links to animal posters, books, and videos.
  
• Wikispecies
  An open, free directory of species. Covering the animalia, plantae, fungi, bacteria, archaea, protista, and all other forms of life.
  
• Animal Pictures Archive
  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.
  
• BabyAnimalz.com
  The cutest collection of baby animal pictures all in one place.
  
• Farm Animals
  For children to learn about farm and wild animals. With animal sounds, illustrations, and photographs.
  
• Fauna Europaea
  Explore the Fauna Europaea database, a database of the scientific names and distribution of all living European land and fresh-water animals.
  
• Kidport Reference Library: The Animal Kingdom
  Learn about animals with the Kidport Reference Library's guide to the animal kingdom, including descriptions, photos, and groupings of invertebrates and vertebrates animals.
  
• Animals A to Zoo
  Gathers together all of Animal Planet's online content dedicated to specific animals including interactives, videos, photo galleries, fact sheets, and more. Find information about wildlife, marine life, insects, domestic cats and dogs, small pets, and even prehistoric animals.
  
• Animal Astronauts
  Discover more about these early space travellers with profiles of animal astronauts with photos and mission details.
  
• Buglife: The Invertebrate Conservation Trust
  Actively engaged in saving Britain's rarest bugs, slugs, snails, bees, wasps, ants, spiders, beetles, and many more fascinating invertebrates.
  
• Things That Make You Go Aahh
  Posts pictures of the cutest wild animals and pets you'll ever see on the Web.
  
• Animal Printouts - Enchanted Learning
  Large, online collection of animal coloring pages. The numerous animal printouts are organized by species, region, and habitat.
  
• NATURE: Critter Guide
  How fast can a cheetah run? How far can a lemur leap? What's the difference between an alligator and a crocodile? Find out the answers to these and many other questions about your favorite animals with this guide from PBS.
  
• WhoZoo
  Pictures and information about animals that can be seen at the Fort Worth Zoo.
  
• BBC: Animals
  Explore science and nature at the BBC site dedicated to the animal kingdom. Includes animal factfiles for wildlife and pets as well as articles, quizzes, show guides, and more.