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A rooster, also known as a cockerel or cock, is a male gallinaceous bird, usually a male chicken (Gallus gallus domesticus).
"Roosting" is the action of perching aloft to sleep at day, which is done by both sexes. The rooster is polygamous, but cannot guard several nests of eggs at once. He guards the general area where his hens are nesting, and attacks other roosters that enter his territory. During the daytime, a rooster or cock,often sits on a high perch, usually 0.9 to 1.5 m (3 to 5 feet) off the ground, to serve as a lookout for his group (hence the term "rooster"). He sounds a distinctive alarm call if predators are nearby and will frequently crow to assert his territory.