rounded and with patches of white on its under side. Length, 9.75 

 inches. 



Migratory. Arrives early in May, leaves about the middle of September. Builds no 

 nest, but lays its eggs on the ground or upon a stump. It is a nocturnal bird, lying closely 

 in cover by day, and consequently not often seen ; at night, however, its call, clearly sug- 

 gesting its common name, is frequently heard, a mournful, but not disagreeable, sound. 



In general appearance the Whip-poor-will resembles the Night Hawk. 



PLATE XL CHIMNEY SWIFT. 



Cbcetura pelagica. 



Sooty brown all over except the throat, which is light gray ; eyes 

 surrounded by a black skin ; wings long, extending when folded beyond 

 the tail ; tail short, spiny, square. Length, 5.40 inches. 



Migratory. Arrives here about April 30, and leaves late in September. Although the 

 Chimney Swift superficially resembles the Swallow, it, in fact, has no real affinity with 

 that bird, and the common practice of naming it a Swallow is an error. Its closest affinity 

 is with the Hummingbird, which is its only superior in the art of flying. 



