Francesco Ungaro · Unsplash Howler monkeys
Genus Alouatta
The loudest land animals, heard long before they are seen.
At a glance
Size 56–92cm body; 4–10kg
Diet Leaves, fruit, flowers
Active Dawn (05–07), Day (07–17), Dusk (17–19)
Layer Canopy
How to spot it
Listen at dawn for their deep, resonant roar carrying up to 5km. Look up into the canopy for slow-moving groups.
Threats and conservation
Howler monkeys is listed as Least Concern by the IUCN Red List (assessed 2020). This section will include sourced information on threats, population trends and active conservation programmes after expert review.
Watching responsibly
- Keep a safe distance. Do not approach to get a closer look or photograph.
- Look, listen, wait. Passive observation causes the least disturbance.
- Never feed, bait, call to or touch this animal.
- Follow all local park and reserve rules.
- Go with a qualified, locally-licensed guide whenever possible.
Sources
Conservation status: IUCN Red List Red List. Assessment year: 2020. Full sources will be listed here after expert review. Last checked: 2026-10-11.
Related animals