Gr 4–8—This well-researched effort, crowded with photos, maps, and text boxes, introduces the migratory habits of a dozen (mostly) North American animals. O'Sullivan explores migration by land (examining snakes, pronghorns, bison, and polar bears), by sea (salmon, manatees, and gray whales), and by sky (cranes and monarch butterflies). In addition to a few pages of general information, each entry contains some "Quick Facts" (the animal's range, how many miles it travels, which seasons it journeys), material on ways in which people are working to protect the species in question, maps of migration paths, and a list of resources for observing these creatures in the wild. The writing is accessible, while the layout is busy yet attractive. The book ends with an extensive index and suggested sites for further study.
VERDICT A fine overview of the topic; ideal for researchers and browsers.
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