Howler Monkey

Howler monkeys are a group of large New World monkey species native to the forests of Central and South America, best known for the loud, resonant howling calls produced with the help of an enlarged hyoid bone in the throat, which can carry for several kilometres through dense forest and are used to declare territory and avoid direct conflict between troops. They are among the most herbivorous of New World monkeys, feeding mainly on leaves supplemented by fruit, and their slow, energy-conserving lifestyle reflects the relatively low nutritional value of a leaf-heavy diet. Howler monkeys live in social troops that spend nearly all their time in the forest canopy, and while some species remain widespread, others are threatened by deforestation across their range.