Posts by Thinh Rub
They hover in mid-air by rapidly flapping their wings 12–80
They hover in mid-air by rapidly flapping their wings 12–80 times per second (depending on the species). They are known as hummingbirds because of t...
They hover in mid-air by rapidly flapping their wings 12–80 times per second (depending on the species). They are known as hummingbirds because of t...
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