The Best Bird #2

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Costa's Hummingbird
Hummers are the smallest of all birds, weighing only a few grams. With tiny bodies, long bills, iridescent feathers, they can hover for extended periods. Their teeny hearts beat as much as 25 times a second and their wings 20-80 times a second while foraging. They fly with a unique method of rotating the entire wing, and little or no flexing of the wrist or hand joints.

It's easy to see how some birders are drawn to seek out and specialize in this bird family - of which there are 320 species in 100 genera in North America alone.

Arizona-Sonora Desert Museum. (1/07)

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