Four rhesus macaques, including a juvenile, perched among vines in a leafy tree.

A family of rhesus macaques on Monkey Mountain

Rhesus Macaque (Macaca mulatta) One of the most widespread primates on Earth, the rhesus macaque is famous for its adaptability and gave its name to the Rh blood-group factor, first identified in this species. Common year-round in Hong Kong’s Kam Shan (“Monkey Hill”) Country Park, where large troops descend from the wooded slopes and are a familiar sight to hikers. Modeled range · iNaturalist · CC BY 4.0 Wikipedia | iNaturalist | Range map

July 4, 2026
A rhesus macaque yawns wide on a bridge railing, flashing its canines against the green hills of Hong Kong.

Yawning macaque

📍 Hong Kong Rhesus Macaque (Macaca mulatta) Bold, adaptable, and not shy about showing teeth — yawning is a common stress-relief or dominance signal, but those canines say “keep your distance” all on their own. Habituated troops treat the bridges and railings of Hong Kong’s country parks as lookout perches, keeping a wary eye on passing hikers from just out of reach. Modeled range · iNaturalist · CC BY 4.0 Wikipedia | iNaturalist | Range map

A rhesus macaque sits dead-center on a dirt trail through lush Hong Kong forest, staring down the photographer.

You shall not pass

📍 Hong Kong Rhesus Macaque (Macaca mulatta) Confident and unbothered by people, a lone macaque will plant itself in the middle of a trail and simply wait for you to give way. They range across Hong Kong’s forested country parks year-round, and encounters on the popular hiking routes near the reservoirs are all but guaranteed. Modeled range · iNaturalist · CC BY 4.0 Wikipedia | iNaturalist | Range map

An adult rhesus macaque carefully grooms a young juvenile on a concrete ledge at Kam Shan, Hong Kong, backed by dense tropical greenery.

Grooming macaques, Kam Shan (金山)

📍 Kam Shan, Hong Kong Rhesus Macaque (Macaca mulatta) One of the most widespread primates on Earth, rhesus macaques are highly social Old World monkeys whose mutual grooming reinforces troop bonds and hierarchy. Around 1,800 wild rhesus macaques inhabit Hong Kong’s Kam Shan (金山) Country Park year-round, descendants of a population released in the 1910s that has thrived in the forested hills ever since. Modeled range · iNaturalist · CC BY 4.0 Wikipedia | iNaturalist | Range map