Boy
the Gibbon

Boy is a yellow-cheeked crested gibbon (Nomascus leucogenys). Males are jet black with distinctive golden-yellow cheek patches — Boy's most striking feature. This species is Critically Endangered on the IUCN Red List, with fewer than 2,000 individuals estimated to remain in the wild across Vietnam, Laos and southern China.

Boy has lived in Vientiane, Laos since August 2016. He holds official CITES Certificate No. 2652, issued April 30, 2026 by the Lao Ministry of Agriculture and Forestry, confirming his legal status as a registered individual of a CITES Appendix I species.

Gibbons produce some of the most complex vocal performances in the animal kingdom. They sing elaborate duets at dawn — the male produces a series of accelerating notes, the female a long, sweeping crescendo called the "great call." These songs can carry more than a kilometre through forest. Boy sings every morning, though his audience is somewhat smaller than intended by evolution.

Brachiation is the art of swinging arm-over-arm through the canopy — the gibbon's primary form of locomotion. Gibbons are the fastest non-flying arboreal mammals on earth, reaching speeds of up to 55 km/h through trees. Their arms, the longest of any primate relative to body size, allow them to swing through gaps too wide for any other ape to cross. Boy demonstrates this daily on whatever structure he finds most convenient.

Yes — all gibbon species are threatened, and Boy's species is Critically Endangered. Primary threats are habitat loss through deforestation in Southeast Asia, hunting, and capture for the illegal pet trade. Gibbons are protected under CITES Appendix I. Boy's legal registration under the Lao CITES framework is part of the national effort to document and protect these animals.

In the wild, gibbons typically live 25–30 years. In human care, with veterinary support and consistent nutrition, they can reach 40–50 years. Boy has been with his family for a decade — if he lives a full life, this story has a long way yet to go.