Alternative Energy cover American Museum of Natural History Birds of North America: Eastern Region cover American Museum of Natural History Birds of North America: Western Region cover Amphibian cover Amphibian, Rev. ed. cover Animals cover Ask a Bug cover Baby Animals cover Big Cats cover Bird cover Bird, Rev. ed. cover Birds cover Bugs cover Bunny cover Butterfly cover Butterfly & Moth cover Cat, Rev. ed. cover Climate Change cover DK Guide to Mammals cover DK Guide to Savage Earth cover DK Guide to Weather cover Desert cover Desert cover Dinosaurs Day cover Dinosaurs cover Dog, Rev. ed. cover Eagle & Birds of Prey cover Earth Matters: An Encyclopedia of Ecology cover Ecology, Rev. ed. cover Endangered Animals cover Farm cover Fish cover Frog cover Gorilla, Monkey & Ape cover Horse cover Horse cover Hurricane cover Hurricane & Tornado, Rev. ed. cover Insect cover Insect, Rev. ed. cover Jungle cover Jungle, Rev. ed. cover Lamb, Rev cover Mammal cover Mammal, Rev. ed. cover Mammals cover Natural Disasters cover Ocean cover Ocean cover Owl cover Pond & River cover Pond & River, Rev. ed. cover Pony cover Predator cover Rain Forest cover Reptile cover Reptile cover Reptiles cover Rivers and Lakes cover Seashore cover Seashore, Rev. ed. cover Shark cover Shell cover Twisters! cover Volcano cover Volcano cover Voyage: Ocean...A Full-Speed-Ahead Tour of the Oceans cover Water cover Weather cover Weather cover Weather, Rev. ed. cover Whale cover Whales & Dolphins cover