Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 53. Chapters: Wing, Feather, Bird vision, Flight feather, Gizzard, Dactyly, Beak, Pygostyle, Cloaca, Plumage, Rump, Gape, Bursa of Fabricius, Uropygial gland, Crop, Gular skin, Comb, Supraorbital gland, Arcopallium, Furcula, Syrinx, Tarsometatarsus, Proventriculus, Keel, Brood patch, Facial disc, Avian pallium, Secarecytosis, High vocal center, Carpometacarpus, Glycogen body, Tibiotarsus, Synsacrum, Jugal, Culmen, Tactile corpuscles of Grandry, Nidopallium, Cnemial crest, Muscle protractor pterygoidei et quadrati.