How birds migrate

the long version

Why do some birds migrate at night and others travel during the day? How do birds that have never migrated before know when to leave and where to go? How does a tiny warbler cross 2,000 miles of ocean in a nonstop flight lasting more than two days? The mysteries of migration have puzzled birders and prompted scientific inquiry for years. Here, in an instructive and engaging style, researcher Paul Kerlinger unravels the intricacies and wonders of migration. Using case studies and illustrations, he explains the basics of flight, the effects of weather and geographical barriers, and flight strategy. Learn how fast and how high birds fly, how far they go in a day, and how they navigate. This fascinating when, where, why, and how of bird migration makes the latest scientific findings available to birders and nature lovers. - Back cover.