Book excerpt: Hopping, burrowing, jumping, swimming, climbing, running and digging--here are 16 examples from the amphibian and reptile worlds, found all over the U.S. Each subject is introduced by a lively couplet, and, for the budding herpetologist, there are carefully labeled scientific drawings and descriptions. A companion to the authors' popular Bugs. Glossaries, range maps, bibliography, and index are included. Full-color illustrations.