hummingbird wiki:
>For other uses, see Hummingbird (disambiguation). Many, see text. Hummingbirds are small birds in the family Trochilidae. They are distingushed by their ability to hover in mid-air by rapidly flapping their wings, 15 to 80 times per second (depending on the size of the bird). They are named for the characteristic hum made by their wings, and are the only birds that can deliberately fly backwards.
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