Webster’s Revised Unabridged Dictionary · 1913
Goatsucker
Goat′suck′er (·sŭk′ẽr), n. (Zoöl.) 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.