Gelada
Mammals Active during the day

Gelada

Theropithecus gelada

Meet the 'Bleeding-Heart Monkey,' a unique grass-eating primate found only in the clouds of Ethiopia. Known for their dramatic red chest patches and massive social herds, they are the last of the ancient beast-apes.

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Quick Identification

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Size

Weight: 11-18.5 kg (24-41 lbs) for females, 18.5-30 kg (41-66 lbs) for males. Length: 50-75 cm (20-30 in).

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Colors

Buff to dark brown fur; hairless bright red skin patch on the chest (more vibrant in dominant males); males have long, flowing capes of hair.

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Key Features

  • Hourglass-shaped red patch on the chest
  • Long, lion-like mane on adult males
  • Pale upper eyelids used for 'eyelid-flick' displays
  • Short, snub-nosed facial profile
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When You’ll See Them

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Activity pattern Active during the day
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Peak hours 7 AM - 6 PM
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Season Year-round
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Diet Specialized grazers; 90% of their diet consists of grass blades, though they dig for nutritious roots and rhizomes during the dry season.
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Habitat High-altitude montane grasslands and afro-alpine moorlands near steep rocky escarpments.

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Where Does the Gelada Live?

Native to the African continent, the Gelada is found exclusively within the rugged Ethiopian Highlands. This core range is concentrated in the Simien Mountains and the central plateau of Ethiopia, where the cool, thin air of the afro-alpine ecosystem supports the vast grasslands they depend on. Because they are endemic to these specific high-altitude regions, they are not found naturally anywhere else in the world.

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1 Countries
140K km² Range
Least Concern Conservation
ET Ethiopia
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iNaturalist / Verified observation data
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Behavior

Geladas are highly social primates that live in a complex, multi-layered society. They are unique among primates as the only species that is almost entirely graminivorous, meaning they spend the vast majority of their day sitting upright and shuffling along the ground to pluck grass. This 'shuffle-gait' allows them to keep their hands free for foraging while remaining in a seated position, which is their primary social posture for grooming and communication.

Unlike many other monkeys, they do not live in trees. Instead, they are master climbers of vertical terrain, retreating to steep, rocky cliffs every evening to sleep in safety away from predators like leopards. During the day, they congregate in massive herds that can reach over 1,000 individuals, creating a noisy and vibrant spectacle of vocalizations, facial expressions, and complex social maneuvering. Interactions with humans are generally peaceful, though they may occasionally raid crops in mountain villages when natural food is scarce.

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Camera Tips

To capture the best footage of Geladas, focus your camera placement on 'cliffside corridors.' These primates travel between their sleeping cliffs and their feeding plateaus every morning and evening. Position your camera along established footpaths right at the edge of the plateau escarpment. Set the camera low to the ground—about 18 to 24 inches high—to capture their unique shuffling movement and get a clear view of the distinctive chest patches.

Use a high-speed burst mode or high-frame-rate video settings. Geladas are incredibly expressive, frequently using 'lip-flips' and 'eyelid-flicks' to communicate. A standard trail camera delay might miss these fleeting social signals. Because they live in high-glare, high-altitude environments, try to angle your camera slightly away from the direct morning sun to avoid blowing out the highlights on the males' long, shaggy manes.

Avoid using food lures. Geladas are specialized grass eaters and are rarely interested in fruit or nuts; furthermore, baiting them can lead to dangerous habituation. Instead, focus on natural water sources during the dry season (October to April). Small alpine seeps or pools on the plateau are magnets for large herds and provide excellent opportunities for group shots and drinking behavior.

Lastly, prepare for the elements. The Ethiopian Highlands experience extreme temperature swings and intense UV radiation. Use high-quality lithium batteries, as standard alkaline batteries will fail in the freezing nighttime temperatures on the cliffs. Ensure your camera housing is fully weatherproof to handle the dense mountain mists that often roll in during the late afternoon.

Frequently Asked Questions

Geladas are strictly diurnal, meaning they are active during the day. They typically leave their cliffside sleeping spots shortly after sunrise to spend the day grazing on the high plateaus, returning to the safety of the cliffs just before dusk.
Unless you live on the edge of the Ethiopian Highlands, you won't find Geladas in your backyard! For those living within their range, the best way to encourage them to pass through is by maintaining natural afro-alpine grasslands and avoiding the use of high fencing that blocks their traditional travel corridors.
Geladas are the world's only graminivorous primates, meaning their diet is almost entirely grass. They eat the blades when they are green and switch to digging for nutritious roots and rhizomes during the dry season when surface grass dies back.
No, Geladas are highly specialized for high-altitude wilderness. However, as human agriculture expands further into the mountains, they are increasingly seen near rural mountain villages where they may occasionally forage in cultivated fields.
While they look similar, you can identify a Gelada by the hairless red 'bleeding heart' patch on its chest. They also have shorter, more vertical faces compared to the long, dog-like muzzles of baboons, and they are only found at high elevations.

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