FAQs — Grey-cheeked Mangabey

The grey-cheeked mangabey (Lophocebus albigena) is a medium-sized African forest monkey named for its pale grey cheek patches and shaggy brown coat. Larger and more robust than guenons, it is a dedicated fruit-eater common in Kibale National Park, Budongo Forest, and Mabira Forest.

Kibale National Park is the premier destination — troops appear on chimpanzee trekking trails and Bigodi Wetland walks. Budongo Forest Reserve (Kaniyo Pabidi and Busingiro) and Mabira Forest also hold healthy populations. See our where to see grey-cheeked mangabeys guide.

The species' common name refers to the pale grey fur on the cheeks and temples — a distinctive field mark visible even when animals feed with heads down. The scientific name albigena also references whitish cheek colouration. The shaggy brown body coat contrasts sharply with these grey facial patches.

Grey-cheeked mangabeys are primarily frugivorous — they feed on figs, drupes, and soft forest fruits, supplemented by seeds, leaves, flowers, fungi, and occasional insects. Fruit abundance shapes daily troop ranging. Full detail on our grey-cheeked mangabey diet page.

Adults typically weigh between 4 and 10 kilograms, with males substantially larger than females. Body length is roughly 40 to 70 centimetres, plus a long tail for balance in the canopy. They are noticeably larger than red-tailed monkeys sharing the same forest.

Troops usually number 15 to 30 individuals, sometimes more where food is abundant. Groups are multi-male and multi-female, with juveniles and infants travelling together through the canopy. Larger troops may temporarily fuse around super-abundant fruit trees.

Globally, grey-cheeked mangabeys are classified Least Concern on the IUCN Red List with a wide Central African range. In Uganda they remain common inside protected forests but face habitat loss and snaring outside park boundaries. See our conservation page.

Yes — frequently. Kibale and Budongo chimpanzee trails pass through prime mangabey habitat. Guides often pause for troops feeding in fig trees overhead. Many visitors see both chimpanzees and grey-cheeked mangabeys on the same morning.

No dedicated permit exists. Sightings occur during chimpanzee trekking, guided forest walks, park nature trails, and community wetland programmes such as Bigodi. Standard park entry and activity permits apply.

Grey-cheeked mangabeys are visible year-round in Kibale, Budongo, and Mabira. Dry seasons (June–September and December–February) offer firmer forest trails. Peak fruiting months can concentrate troops near trails. See best time to see grey-cheeked mangabeys.

Lophocebus albigena — family Cercopithecidae, subfamily Cercopithecinae. Uganda's western populations are generally assigned to the subspecies L. a. johnstoni. The genus was separated from Cercocebus based on genetic evidence.

Grey-cheeked mangabeys are larger with a shaggy brown coat and pale grey cheek patches. Red-tailed monkeys are smaller guenons with a long chestnut-red tail and white nose patch. Both occur in Kibale; mangabeys are more robust and produce deeper booming calls.

Grey-cheeked mangabeys (Lophocebus albigena) occur in lowland rainforest at Kibale, Budongo, and Mabira. The Uganda mangabey (Lophocebus ugandae) is a separate Albertine Rift endemic found only at Mgahinga Gorilla National Park — not at Kibale.

Crowned eagles, leopards, and chimpanzees are the main predators in Uganda's forests. Sharp alarm barks alert troops to aerial and ground threats. Infants and juveniles are most vulnerable at forest edges.

Yes. Budongo Forest Reserve on the Murchison Falls circuit holds grey-cheeked mangabeys alongside chimpanzees, red-tailed monkeys, and mantled guereza. Kaniyo Pabidi and Busingiro areas are productive on forest walks and chimp trekking approaches.

Any itinerary visiting Kibale, Bigodi, Budongo, or Mabira includes mangabeys. Classic routes pair Kibale chimps with Queen Elizabeth and Bwindi gorillas. Browse grey-cheeked mangabey safaris.

Absolutely — one of Uganda's strengths. A typical circuit runs Kibale (chimps and mangabeys) → Queen Elizabeth → Bwindi (gorillas). Most 7–10 day western itineraries include both forest blocks without extra planning.

Moist lowland and mid-elevation tropical rainforest with abundant fruiting trees — especially figs. Swamp-forest margins at Bigodi and riverine gallery forest also suit them. Full ecology on our habitat guide.

Visit protected forests on licensed safaris, pay park and community walk fees, keep distance from troops, and avoid feeding wildlife. Tourism revenue at Kibale and Bigodi funds rangers and local conservation. More on our conservation page.