The louder the howler monkey, the smaller its testicles.
"Primatologist Leslie Knapp, professor and chair of the university's Department of Anthropology, found that the smaller a howler monkey's testicles are, the deeper and louder his mating calls."
Ref: The Salt Lake Tribune
Ref: The University of Utah
DonDiego is not surprised.
Gratuitous Primate Video
"Primatologist Leslie Knapp, professor and chair of the university's Department of Anthropology, found that the smaller a howler monkey's testicles are, the deeper and louder his mating calls."
Ref: The Salt Lake Tribune
Ref: The University of Utah
DonDiego is not surprised.
Gratuitous Primate Video
