Hoolock gibbon

Hylobates hoolock

TAXONOMY

Hylobates hoolock, Harlan, 1834, Chindwin River, Burma. Two subspecies east (H. h. leuconedys) and west (H. h. hoolock).

OTHER COMMON NAMES

English: White-browed gibbon; French: Hoolock; German: Hulock; Spanish: Gibon hulock.

PHYSICAL CHARACTERISTICS

Female size 19 in (48.3 cm); male weight 15.2 lb (6.9 kg); female 15.4 lb (6.1 kg). Sexually dichromatic: male is black with white eyebrows (flicked up laterally); female is golden, darker on cheeks and chest, whitish eyebrows; neonate is white to gray; juveniles of both sexes are black.

DISTRIBUTION

India (northeast states) east and south of Brahmaputra River, Bangladesh, and Myanmar (Burma) east to Salween River.

HABITAT

Tropical semi-evergreen and evergreen rainforest.

BEHAVIOR

Population density 1.7 groups/2.5 mi2 (km2); home range 94 ac (38 ha), 86% defended as territory 77 ac (31 ha); day range 0.8 mi (1.3 km). Notes in songs are diphasic, variable accelerating in both sexes; female great call, 19 notes, about 15 seconds duration.

FEEDING ECOLOGY AND DIET

Their diet is mainly figs and other fruit, also flowers, leaves, and animal matter.

REPRODUCTIVE BIOLOGY

Monogamous. Mate early in the day, probably seasonal, produce single young every two to three years.

CONSERVATION STATUS

Endangered. Relatively tame because humans work in the forest fragments.

SIGNIFICANCE TO HUMANS Usually respected. ♦

0 0

Post a comment