GOATSUCKER
goatsucker, nightjar, caprimulgid
(noun) mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects
Source: WordNet® 3.1
Etymology
Noun
goatsucker (plural goatsuckers)
Any bird in the nightjar family Caprimulgidae
Source: Wiktionary
Goat"suck`er, n. (Zoöl.)
Definition: One of several species of insectivorous birds, belonging to
Caprimulgus and allied genera, esp. the European species (Caprimulgus
Europæus); -- so called from the mistaken notion that it sucks goats.
The European species is also goat-milker, goat owl, goat chaffer,
fern owl, night hawk, nightjar, night churr, churr-owl, gnat hawk,
and dorhawk .
Source: Webster’s Unabridged Dictionary 1913 Edition