Common Nighthawk, Birds of Loja Ecuador.

Distribution: to 2800 mA boreal winter, resident and transient, mainly to lowlands of east, but some records ( most or all transients) from central valley and a few from west. Usually seen in flight overhead. 

In the Loja City has been recorded rarely in parks and gardens probably feeding.

Description. 23 – 24 cm (9 – 9.5″). Closely resembles Lesser Nighthawk, all diferences being subtle;

some nighthawks seen are only identifiable to genus. Common differs in its slightly larger size and somewhat darker overall coloration; somewhat longer and even more pointed wings (with outermost primary longest); position of white wing-band somewhat closer to bend of wing (and wing-band white in both sexes,
though slightly narrower in females); and underside of inner primaries uniformly blackish (with no buff spotting or barring). 

Habits. 

By day rests lengthwise on tree limbs at varying heights (sometimes quite high), less often on ground. Much more apt to be seen when it stars to feed or migrate in late afternoon (sometimes earlier on cloudy days), then quickly gaining altitude and flying with an easy languid garce, at times gliding in a dihedral..

Information taken from the book Birds Of Ecuador of Robert Ridgely and Paul Greenfield