howler monkey

howler monkey (plural howler monkeys)

1. A Central American and South American monkey of the genus Alouatta, noted for its loud call.
   • 1912, Arthur Conan Doyle, The Lost World […], London, New York, N.Y.: Hodder and Stoughton, →OCLC:

     At dawn and at sunset the howler monkeys screamed together and the parrakeets broke into shrill chatter, but during the hot hours of the day only the full drone of insects, like the beat of a distant surf, filled the ear, while nothing moved amid the solemn vistas of stupendous trunks, fading away into the darkness which held us in.