Great herds of zebra thundering across the African plain...fragile butterflies traveling unbelievable distances...family groups of whales coursing through the waves. Many kinds of animals make annual migrations, and their stories reveal incredible strength and will to survive. These treks are magnificently documented in Great Migrations, the children's illustrated companion to the upcoming 7-hour National Geographic television special of the same name.Created for the huge audience of young animal lovers--and for the nation's schools, where migration is taught as part of the core curriculum--this book spotlights wild creatures of highest interest to children. Action-filled photo spreads deliver immense wow appeal as animals vault over obstacles and escape the clutches of predators. Info-graphic spreads pack in the fascinating facts, with at-a-glance information on where, why, and how animals migrate.Throughout the coverage, this timely book addresses the effect of climate change on animal migration--a story that is just now reaching the public, from scientists and other experts who have witnessed alarming trends.