Gillian Houghton 
Owls [PDF ebook] 

This unique book penetrates the myths surrounding the owl to reveal its true nature-a swift and deadly animal perfectly adapted to the task of nocturnal hunting. Using lavishly illustrated spreads, the book shows the various adaptations that make the owl such an efficient hunter-its rotating head, large forward-set eyes, feathered camouflage, sharp beak, and keen hearing. Also examined in brilliantly illustrated diagrams are the owl’s digestive, circulatory, reproductive, and skeletal systems.