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
Plum-headed finch the plumage of this bird; the upper part of the body (nape, back, wings and tail) is in fact a deep brown color, with a tendency to darken on the tail, while the ventral area (cheeks, throat, chest, abdomen and hips) is beige color that turns towards white in the central part of the belly and on the undertail. The bird distinguishes for its fine zebra like colouring, which is white and present on the eyebrows, neck, chest, hips and tail, while on the remiges are two rows of white spots. The beak is black, the legs are flesh-colored and