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 the oval opening. Then it begins to turn from side to side, to flap its wings, move its tail up and down, open and shut its beak and – in some cases – turn its head from side to side, while producing an unbroken stream of birdsong. At the end of the performance the automaton falls back into the box and the lid closes. While the bird is calling, a decorative pierced grille appears with a bird-shaped hole cut into it through which the performer rises and falls. While singing, a bird-shaped piece of grille jumps up to cover the