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Exploring Nature - Animals http://www.exploringnature.org/db/subcat_detail_index.php?dbID=43&subcatID=36
Nature (PBS) Critter Guide http://www.pbs.org/wnet/nature/critter.html
A-Z Animals http://a-z-animals.com/animal-a-z.php
Kids Planet / Defenders of Wildlife. Includes information on animals plus fun games. http://www.kidsplanet.org/index.html
Monterey Bay Aquarium. http://www.mbayaq.org/lc/activities.asp