by
Bonnie Bader
Language: English
Release Date: June 23, 2015
Hummingbirds are some of the most beautiful, tiniest birds in nature. They are the only creatures that can fly forward, backward, sideways—even upside down! Their hearts beat anywhere from 500 to 1200 times every minute; their wings flap as many as 52 times per second; and they breathe up to 600...