How Do Birds Fly

For birds to fly, it is simply not enough that they flap their wings. The angles of feathers on the wings are adjusted from time to time. Moreover, the entire wing has to be twisted in different directions.

When they flap their wings down, it is known as the down stroke. At this time, for no air to pass through their feathers, they deliberately overlap the feathers at the edges of the wings. Then the wings push against the wind. When they flap their wings up, it is known as the upstroke.

Here as they flap their wings up, they also twist their feather a apart to enable air to pass through them. Another motion simultaneously performed, that is the tips of their wings move in a circular movement. The bird is propelled through the air when the tips of its wings push it forward on the down stroke.