Codex on the Flight of Birds of a kite as seeking a wind current. When the winds are high, one will see the bird very high in the sky, but when the winds are low, the bird stays closer to the ground. Leonardo describes how a bird rests in the air, after flapping its wings to gain altitude, by gliding downward to the ground. Folio 6 contains multiple diagrams of birds flying and their bone structure, and all of the commentary is on flight and how birds fly the way that they do. Leonardo starts off by describing how a bird ascends or descends in different
Crowned hornbill Crowned hornbill The crowned hornbill ("Lophoceros alboterminatus") is an African hornbill. It is a medium-sized bird, in length, and is characterized by its white belly and black back and wings. The tips of the long tail feathers are white. The eyes are yellow; the beak is red and presents a stocky casque on the upper mandible. In females, the casque is smaller. The crowned hornbill can be distinguished from the similar Bradfield's hornbill by its shorter beak. The crowned hornbill is a common resident of the coastal and riverine forests of southern (only the eastern coast) to northeastern Africa. It