Get kids thinking with this primer on sky, land, and sea animal migrations. Did you know Arctic terns migrate farther than any other animal? Gray whales can swim up to 12,000 miles during their migration journeys and Emperor penguins walk about 125 miles over ice to reach their nesting grounds. Gail Gibbons explores the many reasons why animals migrate, using direct sentences, maps, infographics, and illustrations. Featuring...