What's the use of ostrich wings?

The ostrich is the largest and heaviest bird in the world. due to the inconvenience of foraging in the air, the ostrich has to stay on the ground. over time, its wings degenerate and become unable to fly. However, their wings still have the following major uses: when they run with the wind, they spread out like the sails of a ship, which can increase speed; when fighting, they can expand their momentum to scare off the enemy; under the hot sun in the desert, spread their wings like a huge sunshade, which can bring shade to the nestling; when courtship, the male spreads his wings in front of the female, as if dancing, to seduce each other.

Why can't ostrich fly?

The ostrich cannot fly not because of wing size and muscle ability, but because of flying feathers and tail feathers and tail fat glands that do not have take-off function.

The ostrich is too heavy and often forages and moves on the ground. over time, its wings begin to degenerate, the flight feathers and tail feathers that no longer have the function of take-off in their feathers, and the tail fat glands of the featherless protector, which are used to secrete oil to protect the feathers from deformation. Flying birds do not have feathers in some places, that is, the so-called feather area and bare area, but the feather growth pattern of ostrich is all evenly distributed on the body surface, and there is no distinction between feather area and bare area, so it is impossible to fly.