What is the only bird that can fly upside down?

The only bird that can fly upside down is the hummingbird. Hummingbirds can hover in the air by flapping their wings quickly (15 to 80 times per second, depending on the size of hummingbirds), and they can also fly back and forth from left to right.

The only bird that can fly upside down is the hummingbird. Hummingbirds belong to the Swift Hummingbirds family. They are very small and are one of the smallest birds in the world. They get their name from the hum of flapping wings. Hummingbirds can hover in the air by flapping their wings quickly (15 to 80 times per second, depending on the size of hummingbirds), and they can also fly back and forth from left to right.

Hummingbirds usually have blue or green feathers, and their lower bodies are lighter. Some males have crests or slender tail feathers. Most males are blue-green, some are purple, red or yellow. The feathers on the female bird are dull. Hummingbirds have two subfamilies, cryptoptera and hummingbird. Hidden birds are generally brown, gray and red, without iridescence. Hummingbird subfamily has rainbow-colored feathers with metallic luster of red, orange, blue and green. Iridescent is mainly concentrated in the head, upper body and lower body of male birds. Some males also have beautiful feathers, such as distinctive throat spots, crests and slender tail feathers.

Hummingbirds are too small to be preserved as fossils, and their evolutionary history remains a mystery. Hummingbirds mostly live in Central and South America, and the hummingbird fossils of 6.5438+0 million years ago were found in South America, so scientists believe that hummingbirds originated in the Pleistocene. However, in southern Germany, scientists discovered the oldest hummingbird fossil in the world, which has a history of more than 30 million years. So the ancestors of hummingbirds appeared as early as Oligocene.