Friday, June 14, 2013

American Crow


American Crows are familiar over much of the continent: large, intelligent, all-black birds with hoarse, cawing voices. They are common sights in treetops, fields, and roadsides, and in habitats ranging from open woods and empty beaches to town centers. They usually feed on the ground and eat almost anything – typically earthworms, insects and other small animals, seeds, and fruit but also garbage, carrion, and chicks they rob from nests. Their flight style is unique, a patient, methodical flapping that is rarely broken up with glides. Crows are rarely found alone.

American Crows congregate in large numbers in winter to sleep in communal roosts. These roosts can be of a few hundred up to two million crows. Some roosts have been forming in the same general area for well over 100 years. In the last few decades some of these roosts have moved into urban areas where the noise and mess cause conflicts with people. Despite its tendency to eat roadkill, the American Crow is not specialized to be a scavenger, and carrion is only a very small part of its diet. Though their bills are large, crows can’t break through the skin of even a gray squirrel. They must wait for something else to open a carcass or for the carcass to decompose and become tender enough to eat. The oldest recorded wild American Crow was 16 years old. A captive crow that died in New York lived to be 59 years old.
American Crow Range Map

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