Odd Couples: A Guide to Unlikely Animal Pairs

Odd Couples: A Guide to Unlikely Animal Pairs — page 5
They both hum Hummingbirds are so well known for their hum it's how they got their name Their fast beating wings produce the sound you hear In fact the bee hummingbird flaps its wings up to 80 times every second when it flies Besides making that distinctive hum those super speedy wings also help hummingbirds do something no other bird can do fly backward