Richard Kent Hummingbirds create a humming sound by their beating wings which flap at high frequencies audible to humans. They hover in mid-air at rapid wing flapping rates, typically around 50 times per second, but possibly as high as 200 times per second, allowing them also to fly at speeds exceeding 34 mph, backwards or upside down. Hummingbirds have the highest metabolism of any homeothermic animal. To conserve energy when food is scarce, they have the ability to go into a hibernation-like state (torpor) where their metabolic rate is slowed to 1/15th of its normal rate God bless, Richard
Posted on: Sun, 04 Jan 2015 19:07:04 +0000
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