Mexican Whip-poor-will

The Mexican whip-poor-will, (Antrostomus arizonae), is a medium-sized nightjar of the southwestern United States, Mexico, and northern Central America. == Taxonomy and systematics == Until 2010 the Mexican whip-poor-will and what is now the eastern whip-poor-will (Antrostomus vociferus) were considered conspecific under the name whip-poor-will. They were separated based on differences in their genetics, morphology, and vocalizations. The two remain sister species and with the Puerto Rican nightjar (A. noctitherus) form a superspecies. The Mexican whip-poor-will has these five subspecies: A. a. arizonae Brewster (1881) A. a. setosus van Rossem (1934) A. a. oaxacae Nelson (1900) A. a. chiapensis Nelson (1900) A. a. vermiculatus Dickey & van Rossem (1928) == Description == The Mexican whip-poor-will is 23 to 24 cm (9.1 to 9.4 in) long and weighs 45 to 50 g (1.6 to 1.8 oz). In general its upperparts are grayish brown with blackish brown streaks; the crown has wide blackish brown stripes. The throat and breast are blackish with a thin white band on the lower throat between them. The belly is buff with brown bars. The male's outermost three pairs of tail feathers have broad white tips; the female's are narrower and buffy. The wings are brown with…