They soar and they glide, they flap and they flutter, they swoop and they plummet. Solo or en masse, in formation or pas de deux, birds in flight are in their element, their airborne behavior as varied and distinctive as their plumage. In this book, wildlife biologist Carrol Henderson, a twenty-year veteran of bird-watching around the globe, offers his insights into spotting and identifying birds in flight. With 150 of Hendersons exquisite close-up photographs of airborne birds, as well as diagrams illustrating the principles of flight and detailed information based on firsthand research, this book is as informative as it is simply delightful to look at. The singular beauty of an iridescent hummingbird pollinating a flower, the majesty of a condor soaring above the Andes, the impressive spectacle of migrating geese in Minnesota, black storks in Kenya, or Swainsons hawks in Bolivia: in your back yard or far afield, this guide lets you enjoy the beauty of birds taking wing while learning the fascinating science of how, precisely, birds fly.