When the seasons change, many animals migrate to new homes. Readers will learn about these fascinating creatures in Nature's Great Journeys. This series explores the physical features, behaviors, and histories of migratory animals with easy-to-read text and vivid images. This is an AV2 media enhanced book. A unique book code printed on page 2 unlocks multimedia content. This book comes alive with video, audio, weblinks, slide shows, activities, quizzes, and much more.