Assertion: howler monkey's call | /r/CreatedBy | male
Facets:
Source sentences:
text: The mantled howler gets the name "howler" from the calls made by the males, particularly at dawn and dusk, but also in response to disturbances.
text: The male mantled howler has an enlarged hyoid bone, a hollow bone near the vocal cords, which amplifies the calls made by the male, and is the reason for the name "howler".