What can only hummingbirds do, unlike other birds?

The hummingbird is a small bird of American origin, ranging in size from six to twenty centimeters (giant species). These birds have a very juicy bright color, which, when hit by light rays, shimmers like a precious stone. The exclusive feature of this species is that only they can fly backwards in the opposite direction. The smaller the bird is, the more times it can flap its wings (from 8-10 to 80-100 times per second), which is not always perceptible to the human organ of vision.