Most sites focus on a particular animal group or ecosystem.
Some sites also discuss the various roles within food chains and how food chains differ from food webs. This site covers the anatomy and physiology of cats and how they have adapted from the first sabertooth tiger. This site takes you on a journey 2000 feet below the surface to investigate the giant squid and its relatives. There are descriptions, photos, and sketches of the many adaptations these animals have gained through life in the deep sea. Learn the differences and similarities between animal groups.