New World Monkey

Howler Monkeys

Alouatta

Howler monkeys are robust New World monkeys of Central and South America, best known for producing the loudest call of any land animal.

Red howler monkey with shaggy coat sitting high in dense rainforest foliage

Classification

Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Primates
Family
Atelidae

Other Names

Howler

Size

22–36 inches long; 7–22 lbs.

Description

A robust, stocky build, a prehensile tail, and an enlarged hyoid bone in the throat that resonates their calls.

Behavior

Spends much of the day resting, since its leaf-heavy diet provides relatively little energy.

Diet

Primarily leaves, supplemented with fruit and flowers.

Communication

A dawn and dusk roaring chorus audible up to three miles away, used to mark territory.

Habitat

Forests across Central and South America.

Life Cycle & Society

Gestation
~186 days
Sexually Mature
3–5 years
Life Span
15–20 years
Athleticism
Slow, deliberate movers
Conservation Status
Several species Endangered

Howler troops of 6–15 defend a territory almost entirely through sound rather than confrontation. Habitat loss and periodic yellow fever outbreaks have made several species a conservation priority.

Selected Species

  • Mantled Howler

    Alouatta palliata
  • Black Howler

    Alouatta caraya
  • Red Howler

    Alouatta seniculus
  • Brown Howler

    Alouatta guariba

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