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(species Caprimulgus carolinensis), nocturnal bird of the family Caprimulgidae, found in the swamps, rocky uplands, and pine woods of the southeastern United States, migrating to the West Indies, Central America, and northwestern South America. This nightjar is named for its call (second and third syllables accented, first syllable weak), which it may repeat 800 times without stopping. It lays two eggs on the ground; if threatened, the parent may carry away an egg in its huge mouth. Often confused with the whippoorwill, the chuck-will's-widow is larger (to 30 cm [12 inches]) and reddish brown, with little or no white in the tail