**Celebes crested macaque (Macaca nigra)**

One of the world’s most endangered macaques, endemic to northern Sulawesi and instantly recognizable by its distinctive crest and jet-black coloration.

Context

A family group was observed in the forests of Tangkoko Nature Reserve, northern Sulawesi, Indonesia, searching for food scraps near the beach after lunchtime.

Field notes

Celebes crested macaques are highly social primates, living in groups ranging from a few individuals to more than sixty. They spend much of the day foraging in and around tropical forests, occasionally raiding crops and gardens near villages.

In Tangkoko Nature Reserve, some groups have become habituated to human presence and frequently approach the beach area around lunchtime in search of unattended food. As a result, the species is sometimes regarded as a pest by local villagers and farmers, while hunting for bushmeat remains a major threat.

Tangkoko supports some of the largest remaining wild populations of the species within its native range and is considered one of its most important strongholds. In many other forested areas within its historical distribution, the species has become surprisingly scarce or has disappeared entirely.

Key facts

Celebes crested macaques are easily distinguished from most other macaque species by their distinctive facial shape, greatly reduced tail, prominent crest, and entirely black coloration.

One closely related species, the Gorontalo macaque from north-central Sulawesi, looks particularly similar. Differences in physical characteristics, including the coloration of the ischial callosities, can help distinguish the two species.

These macaques are primarily terrestrial but regularly climb trees for resting, social interactions, and avoiding potential threats. Their diet consists mainly of fruits, invertebrates, and young vegetation.

Conservation

The species is currently listed as Critically Endangered on the IUCN Red List. Outside Tangkoko, reliable population estimates remain limited, making it difficult to assess the status of many surviving groups.

The main threats include hunting for bushmeat, habitat loss, and, to a lesser extent, capture for the illegal pet trade.

A large introduced population, sometimes estimated at around 100,000 individuals, exists on Bacan Island in the Maluku Islands. However, because this population lies outside the species’ native range, it is generally considered separately when assessing the conservation status of its original wild populations.

The long-term conservation of the Celebes crested macaque depends on effective habitat protection, hunting regulation, and continued conservation programs. Captive breeding populations maintained in zoological institutions in Europe and North America also contribute to public awareness and support for conservation initiatives.