Animal Diversity Web
Animal Diversity Web from the University of Michigan Museum of Zoology is an online database of animal natural history, distribution, classification, and conservation biology that offers information about the structure and classification of animals, basic concepts of ecology and evolutionary biology, brief reports on thousands of animals, and lots of pictures. It also features sounds from the wild, including wolf howls, bat calls, and frog peeps. It is important to note that university students write the text of the reports and, thus, the University of Michigan guarantee their accuracy.
Other special features include virtual reality images of mammal skulls, an article about scientific names, and resources for K-12 instructors.