Chuck-will’s-widow is a bird of the twilight and night hours. Silent during the daylight hours, its penetrating voice, which is remarkably strong, may be continuously heard in the regions that it inhabits during the evening hours and for a time preceding the returning light of day. It is said that on a still evening its call may be heard for more than one mile. In its large eyes and head, its loose and somber colored plumage, its quiet flight and nocturnal habits it resembles the owls. Its short bill and the shape of the wings, permitting rapid flight, give it a close relationship to the swifts. Its mouth is peculiarly fitted for the capture of insects. The gape is enormous, and when the mouth is fully open, will measure nearly two inches from side to side. It is also aided in ensnaring insects by the long, bristle-like whiskers at the base of the mouth. It will catch and swallow the largest of the night-flying moths, and though it seems almost incredible small birds not infrequently form a part of its diet. An observer found in the stomach of one “among an indistinguishable mass of brownish matter, a small bone, about half an inch long.” In another stomach he found the remains of a hummingbird only partially digested and well enough preserved for him to identify the species. Dr. F. W. Langdon states that he examined the stomach of a female Chuck-will’s-widow that “contained the partially digested body, entire, of a swamp sparrow, intermingled with the feathers of which were numerous remains of insects, chiefly small beetles.” While hunting for food the Chuck-will’s-widow flies low, often but a few feet above the surface of the ground. In this habit it differs from the night-hawk, which, like the swifts, seeks its food high in the air. Now and then it rests, perching on old logs or fences, from which it will launch forth in pursuit of prey which its keen eyes have sighted. During the day it roosts in hollow trees or upon a large limb in some densely shaded spot. It does not attempt to build a nest. The two dull white eggs are laid upon the ground or upon leaves in some secluded place in woods or thickets. It is said that this bird, when disturbed at its nest, will remove either its eggs or the young, as the case may be, to a place of safety by carrying them in its mouth.