Owls of the world
Active only at twilight or in the dark of night, most species of owl are seldom seen. Even the most zealous birders rarely encounter owls, and attempts to identify them are complicated by the number of species that are almost indistinguishable by plumage alone. This comprehensive guide (a thoroughly updated edition of the authors' previous volume, Owls: A Guide to Owls of the World), penetrates the mysterious world of owls with full color illustrations, detailed species descriptions, useful information on vocalizations, and much more
Print Book, English, 2008
2nd ed
Yale University Press, New Haven, 2008