Includes index.

A brief explanation of migration, including what it is, why and how animals migrate, and how people affect migration. Army ants move along the jungle floor with millions of their friends, eating everything in sight. Pacific golden plovers fly nonstop for five days across the ocean. Whether to relocate, find food or raise their young, animals migrate in many surprising ways. The Arctic tern is the world's long-distance migrating champion, flying from the Arctic to the Antarctic and back again every year. When their food source runs low, thousands of mountain-dwelling Norway lemmings rush down the steep slope in search of a new mountain to call home. The bogong moth uses the Moon to guide its migration.

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