BEFORE & AFTER

With scrupulous care and exhibiting obvious research, Thornhill (Crow and Fox, 1993, etc.) presents seven biomes, one in every spread—tropical coral reef, wetland, savannah, meadow, temperate forest edge, rain forest, and school yard—on which appear about two dozen animals in a natural setting; the animals appear again in miniature and labeled in the colored border. A second spread of the featured biome follows, showing it a few seconds later, a minute later, a day later, a year later, etc. Children can observe the action at a tranquil watering hole a minute before a lioness leaps onto the scene, or the few seconds it takes for creatures at a coral reef to scatter and hide once the shark shows up. At the school yard, the ``before'' scene shows that a habitat is being created, with trees in burlap bags and gardening equipment; the ``after'' spread is set a year later, when the garden has become leafy and birds, butterflies, squirrels, and frogs have settled into the environment along with the children. A section of nature notes provides an additional paragraph of information for each locale, while the handsome, heavily detailed full-color drawings make a guessing game of some of the animals' hiding spots. Useful for biome study or just for browsing. (Picture book/nonfiction. 3-8)