It’s a long-held belief that loud mouths overcompensate for something, but in the case of howler monkeys, science has confirmed it’s a biological fact. A landmark study by Dr. Jacob Dunn at Cambridge ...

If you lose your sight, you make up for it with other senses. If one arm is amputated, you learn to do twice as many things ...

On an island in Panama, a fad that one researcher called "viscerally disturbing" has recently taken off among a group of young male monkeys. These adolescents and juveniles have started to kidnap the ...

Male capuchin monkeys on a Panamanian island were documented carrying around infant howler monkeys for no clearly discernible reason. By Elizabeth Landau Capuchin monkeys don’t generally hang out with ...

Part I. Introduction. 1. Why is it important to continue studying the behavioral ecology and conservation management of howler monkeys? / Martín M. Kowalewski, Paul A. Garber, Liliana Cortés-Ortiz, ...

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 ...