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
Amphiptere Amphiptere An Amphiptere (also called Amphithere, Amphitere, or Phipthere) is a type of winged serpent found in European heraldry. Amphipteres generally were said to have greenish-yellow feathers, a serpentine body similar to a lindworm, bat-like green wings with feathered bone, and an arrow-tipped tail much like a wyvern's. Others are described as entirely covered in feathers with a spiked tail, bird-like wings, and a beak-like snout. Even more uncommon is the description of one with legs. Amphitheres feature in the "Dragonology" series of books, which employ a conceit that dragons are real. It also appears in "Dracopedia: A Guide to