It is said that the hummingbird is the smallest bird. How big is the hummingbird?

Hummingbirds weigh 2.5-6.5g, have a body length of 6- 12cm and weigh less than 2g.

Hummingbirds have various beaks, and beaks of different lengths and shapes are usually good indicators to identify their consumption of different flowers. Hummingbirds have an extensible forked tongue, which is convenient for sucking nectar. Hummingbirds are typical small-footed birds. They can't walk on the ground.

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.

Extended data:

Hummingbirds, like other birds, have no developed olfactory system and mainly rely on vision. Hummingbirds, unlike most vertebrates, are sensitive to ultraviolet light of 325-360 nanometers, which is convenient for them to find some flowers with ultraviolet spectrum.

Male birds usually gather in ancient courtship places to show off their courtship behavior, and female birds will also come here to choose a mate. When courting, the male bird will perform wonderful flying skills in front of the female bird. The flying height can rise to more than 30 meters, then dive to the female bird, dive to the bottom and then float.

Hummingbirds spend 70% of their time resting because of their high metabolic rate and the consumption of active flight. Strong curiosity will drive them to take colorful objects as food to find out. Hummingbirds are diurnal birds, foraging during the day, and the peak of foraging is at dawn and dusk.