Goldencheeked gibbon

Nomascus gabriellae

TAXONOMY

Nomascus gabriellae (Thomas, 1909), Langbian, Vietnam. Probably monotypic species.

OTHER COMMON NAMES

English: Buff-cheeked gibbon, yellow-cheeked crested gibbon; German: Gelbwangen-Schopfgibbon.

PHYSICAL CHARACTERISTICS

Weight 12.7 lb (5.8 kg). Male, black with yellowy out-brushed cheeks, rusty brown on chest; female, pale yellow or orange-yellow, yellowish incomplete face ring, cheek hair brushed out; infants born whitish buff, changing to black until puberty (females).

DISTRIBUTION

Southern Vietnam and Cambodia east of the Mekong River. HABITAT

Tropical evergreen and semi-evergreen rainforest. BEHAVIOR

Male emits staccato and multi-modulated phrases, no booms, soft and irregular; female great call of rapid rising notes, 11 notes, 13 seconds, terminating with male coda.

FEEDING ECOLOGY AND DIET Nothing is known.

REPRODUCTIVE BIOLOGY

Monogamous. Single young produced every three years or so.

CONSERVATION STATUS

Vulnerable.

SIGNIFICANCE TO HUMANS

Indigenous people revere and fear them. Elsewhere, there is trade in live animals, often for food or to make medicines, in particular from the bones. ♦

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