Grenada Publishing, 1985. Hardcover in dust jacket in Very Good condition. Zoologist Robert Burton presents a full account of why birds do with they do. All the diversity of bird life is here, from the tiniest hummingbirds to the gigantic flightless predators of prehistoric times, from the hardy survivors of the polar night to the extravagantly plumed beauties of the tropical rain forest. Nearly 600 striking photographs, all of them in full color and many especially commissioned for this book, celebrate the beauty of birds at the same time as they show the intricacy and fascination of bird behavior.