Howler monkey roars exaggerate body size but are truthful to other howlers

Howler monkeys are relatively small primates known for their incredibly loud, low-frequency roars that sound as if they come from a much larger creature. This is useful in the animal kingdom because ...
ZME Science

Monkeys With Smaller Testicles Scream Louder to Compensate

Dunn’s team analyzed the biological “budget” of these primates and found a direct negative correlation: males with large ...
Investing

Howl of a good time: Deep monkey roars come with intimate secret

WASHINGTON (Reuters) - The howler monkeys whose guttural calls reverberate through Central and South American rainforests possess a secret that the males of the species may prefer to be left ...
EurekAlert!

For howler monkeys, deeper roars mean less sperm

Howler monkeys are named for their impressive howling roars. Their vocal abilities are linked to long vocal folds and a hyoid bone uniquely adapted to resonate sound, making males seem bigger than ...
Yahoo

Howl of a good time: Deep monkey roars come with intimate secret

A black howler monkey vocal chorus is seen at the Biological Field Station Corrientes, Argentina in this handout image released to Reuters on October 21, 2015. REUTERS/Mariana Rano/Handout via Reuters ...