Amazing Hummingbirds!

The New York Times reports Hummingbirds have long intrigued scientists. Their wings can beat 80 times a second. Their hearts can beat more than 1,000 times a minute. They live on nectar and can pack on 40 percent of their body weight in fat for migration. But sometimes they are so lean that they live close […]

via The Amazing Metabolism of Hummingbirds — Natural History Wanderings