Which primate is widely known for producing the loudest call of any land animal?

The howler monkey is widely known for producing the loudest call of any land animal.

Howler monkeys use deep roars and howls to advertise their location, maintain spacing between groups, and reduce the need for direct confrontation. Their calls can travel through dense tropical forests over long distances, where leaves and tree trunks make visual contact difficult.

The sound is amplified by an enlarged hyoid bone, a hollow structure in the throat that acts as a resonating chamber. Males generally have larger hyoid bones than females, and in some species the loudness of the call is associated with body size and social competition.

“Loudest” claims depend on how sound is measured and at what distance, so comparisons should be treated as ecological descriptions rather than a single universal contest. The howler monkey’s reputation concerns land animals and does not mean it produces the loudest sound of every animal in every environment.