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
Singing bird box octave. The winged performer varies in size but 30 mm from beak to tail is common. The bird itself consists of a brass frame to which two half-body shells are attached, each half-shell having one wing pivoted to its side. To dress a few of them, feathers of South American hummingbirds were utilized in the past for their brilliant red, green and blue iridescent colours, which gave a well feathered bird an almost jewel-like appearance, but nowadays they are no longer available. As for the movement, this is a compact device located between two brass plates. Two mechanisms have been