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Howler Monkey — printable fact sheet
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Howler Monkey
Alouatta spp.
The howler monkey is the loudest land animal in the Americas and among the loudest anywhere, and its call — a rolling, guttural roar that sounds far too large for the animal producing it — can carry several kilometres through dense forest. The instrument is anatomical: the hyoid…
Did you know?
- Howler monkeys are considered the loudest land animals in the Americas and their calls can travel up to 5 km (3 miles) through dense rainforest.
- Its roar carries several kilometres, produced by a hugely enlarged, hollow hyoid bone that works as a resonating chamber. Males with the biggest resonating chambers have the smallest testes — the two trade off directly against each other. It lives mostly on leaves, which yield so little energy that it spends most of the day resting. It is among the loudest land animals on Earth.
What I learned
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