Black-crested gibbon

Description

The length from the head to the end of body is 43–54 cm (17–21 in) and it weighs from 6.9 to 10 kg (15 to 22 lb).The species exhibits sexual dichromatism,the male is almost completely black,but sometimes with white or buff cheeks,while the female is a golden or buff colour with variable black patches,including a black streak on the head.