The World of Biomes - from the University of California at Berkeley Museum of Paleontology
Biomes - from the Center of Educational Technology
Biomes-Habitats - from the EnchantedLearning.com site
Major Biomes of the World - from the Physical Geography department of Radford University
Earth Observatory - from NASA
Habitats and Biomes - from the ThinkQuest.org site
Introduction to Biomes - from the Charter College of Education, California State University, Los Angeles