Dear WW: I lived for a year in cottage at TB san where a whippoorwill sat just outside
my bedroom window and "whipped poor Bill" for hours without a letup. You should see
the mouth on one of those guys. They evidently strain bugs out of air at night. Very
rare now, pesticides got em I guess.

Here's a URL to a picture. The injured whippoorwill I saw back in early fifties had horrid
black bristles around mouth to trap flying insects. I see none in this picture.
http://royal.okanagan.bc.ca/newsletr/v3n2/v3n2p7.html

whippoorwill (Notice the Latin name!)
n.,
pl. 3wills# or 3will# 5echoic of its cry6 a dark, insect-eating, nocturnal nightjar (Caprimulgus vociferus) of E North America