Question

Why are they called hummingbirds

Answer 1

Answer:

when there wings close together it makes a humming noise they beat their wings so fast

Answer 2

They are known as hummingbirds because of the humming sound created by their beating wings, which flap at high frequencies audible to humans. They hover in mid-air at rapid wing-flapping rates, which vary from around 12 beats per second in the largest species, to in excess of 80 in some of the smallest.