|MadSci Network: Zoology|
There are approximately 4,000 species of frogs and toads, with more species being discovered each year. (http://www.rainforest-alliance.org/kids&teachers/kids/frog-pond/) The United States has about 90 species. http://www.frogweb.gov/ Unfortunately, many species are dying out,due to pollution and habitat destruction. Frogs, like all amphibians, have a porous skin. This means that water can "leak" out of their skin, and pollutants can "leak" in. Because of this, amphibians are very sensitive to climate changes and any toxins in their environments. Scientists use frogs and toads to tell the health of a particular environment: if the frogs are healthy, then the habitat probably is, too! Sincerely, S. Kohler Your mad scientist
Try the links in the MadSci Library for more information on Zoology.