Pileated gibbon

Hylobates pileatus

TAXONOMY

Hylobates pileatus (Gary, 1861), Cambodia. Monotypic species.

OTHER COMMON NAMES

English: Capped gibbon, crowned gibbon; German: Kappengibbon; Spanish: Gibon de cresta negra.

PHYSICAL CHARACTERISTICS

Male weight 17-23 lb (7.86-10.45 kg); female 14-19 lb (6.36-8.64 kg). Sexually dichromatic: male is black, with white head ring, hands, feet, and preputial tuft; female is silvery buff, with black cheeks, cap, and chest; young is creamy, turning to gray by subadult.

DISTRIBUTION

Southeast Thailand and Cambodia (west of Mekong River). HABITAT

Evergreen (and semi-evergreen) tropical rainforest.

BEHAVIOR

Population density 5.0 groups/2.5 mi2 (km2); home range 89 ac (36 ha), 75% defended as territory: 67 ac (27 ha); day range 0.5 mi (0.8 km). Male, short notes, diphasic, trill; female, short, rich rising notes to rich bubble, about 75 notes, great call duration 18 seconds.

FEEDING ECOLOGY AND DIET

Diet is mainly fruit, including figs, also flowers, leaves, and animal matter.

REPRODUCTIVE BIOLOGY

Monogamous. Single young produced every three years or so.

CONSERVATION STATUS Vulnerable.

SIGNIFICANCE TO HUMANS

Elusive, respected, and has human-like face as well as upright posture. ♦

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