Birds in the Spring Birds in the Spring Birds in the Spring is a "Silly Symphonies" animated Disney short film. It was released in 1933. Various birds are seen building nests and caring for eggs. One pair anxiously awaits the hatching of three eggs, then joyfully summon all the other birds to see their new, noisy hatchlings. Time jumps forward to when the hatchlings are fully fledged, learning to sing and fly. One becomes lost and explores the ground, encountering grasshoppers, humming birds and then a rattlesnake that attempts to eat the baby bird. The bird manages to lead the snake into tying itself
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