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common nighthawk
The common nighthawk (''Chordeiles minor'') is a medium-sized 〔〔 crepuscular or nocturnal bird,〔〔 whose presence and identity are best revealed by its vocalization. Typically dark〔 (grey, black and brown〔), displaying cryptic colouration and intricate patterns, this bird is difficult to spot with the naked eye during the day. Once aerial, with its buoyant but erratic flight, this bird is most conspicuous. The most remarkable feature of this aerial insectivore is its small beak that belies the massiveness of its mouth. Some claim appearance similarities to owls. With its horizontal stance〔 and short legs, the common nighthawk does not travel frequently on the ground, instead preferring to perch horizontally, parallel to branches, on posts, on the ground or on a roof.〔 The males of this species may roost together but the bird is primarily solitary. The common nighthawk shows variability in territory size.〔
This caprimulguid has a large, flattened head with large eyes; facially it lacks rictal bristles. The common nighthawk has long slender wings that at rest extend beyond a notched tail. There is noticeable barring on the sides and abdomen,〔 also white wing-patches.〔
The common nighthawk measures long,〔 displays a wing span of 〔 weighs ,〔〔 and has a life span of 4 to 5 years.〔
==Pseudonyms==
The common nighthawk is sometimes called a "bull-bat", due to its perceived "bat-like" flight, and the "bull-like" boom made by its wings as it pulls from a dive.〔 Another name is "goatsucker" (the Latin for goatsucker is Caprimulgus), from an archaic, erroneous idea that the birds would fly into barns at night and suck dry the teats of goats.〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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