consume small insects.

Hummingbirds are known by that name because of the humming sound created by their beating wings, which flap at high frequencies audible to other birds and humans. They hover at rapid wing-flapping rates, which vary from around 12 beats per second in the largest species to 99 per second in small hummingbirds.

Hummingbirds have the highest mass-specific metabolic rate of any homeothermic animal.

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