The smallest bird in the world is a bird called Humming Bird, which are found only in North and South Americas. They can fly backwards, and are the only group of birds able to do so. Their English name derives from the characteristic hum made by their wings. Males of the bee hummingbird living on Cuba and on Isla de la Juventud, weigh 1,6g, and their length is 5,7cm, Half of length make a tail and a beak. Females are a bit larger.
The speed of their flight can reach 80 km/h. They doing to 80 swings in a second.
Most hummingbirds have bills that are long and straight or nearly so, but in some species the bill shape is adapted for specialized feeding.
The maximum life expectancy of the hummingbird is 8 years. They eat every ten minutes.
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