Word Study
goatsucker
CIDE DICTIONARY
goatsucker, n.
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 . [1913 Webster]
For further exploring for "goatsucker" in Webster Dictionary Online