It's the same way with another second cousin, Chuck-will's-widow.
"The Burgess Bird Book for Children" by Thornton W. Burgess
That cry was made by a goat-sucker, one of those `Chuck-Will's-widow' sort of fellows.
"Through Forest and Stream" by George Manville Fenn
Take Cousin Whip-poor-will, who wears whiskers, for instance; and Cousin Chuck-will's widow, who wears whiskers that branch.
"Bird Stories" by Edith M. Patch
This species is the same length as the Chuck-will's-widow, but is not as stoutly built, and has a slightly longer tail.
"The Bird Book" by Chester A. Reed
The Whip-poor-will and the Chuck-will's-widow both belong to this family.
"Natural History in Anecdote" by Various
In the Southern States a somewhat larger whip-poor-will, but with the same habits, is known as chuck-will's-widow.
"Birds Every Child Should Know" by Neltje Blanchan
Instead of the common whip-poor-will of the Northern and Middle States, the South has the CHUCK-WILL'S-WIDOW, who is somewhat larger.
"The Children's Book of Birds" by Olive Thorne Miller