Scientific name : Hylobates hoolock (Harlon)
Order : Primates
Family : Hylobatidae

Status :
IWPA - Schedule I. CITES - Appendix I.
Red Data Book ( India ) - Endangered. IUCN - Endangered. U.S.ESA - Endangered.                                                                                                          
Common names : English      - Hoolock Gibbon          
                              Hindi        - Uluk                        
                              Adi           - Ulu Bandar
                              Assamese - Hulu
                              Bengali     - Ulluk     

Group : Gibbon, Lesser Ape
                                                
Measurements : Head and body -
                                456 to 630 mm.
                        
Body weight : Male - 6.1 to 7.9 kg;
                        Female - 6.0 to 6.6 kg.

Head : Small and round. Colour black with silver white band above eye brows.

Hands and feet : Very long, particularly the arms which are double the length of  legs. Black.
 
Tail : Absent.              
                                                                        
Body : Fur shaggy, long and dense. Adult males and  young  females black, while  adult  females gold, buff or brown.

Range : India - South of   the  river Brahmaputra and east of  river Dibong in north-eastern India.
Elsewhere - Bangladesh, China, Myanmar.  

Habitat : Evergreen, semi-evergreen and moist deciduous    forests   mainly   along hill slopes.

Threats : Fragmented populations; Destruction   of    habitat; Hunting   for   food    and medicine.

Similar species : Hylobates lar of  Indonesia, Malaysia, Thailand.     

Indian subspecies : H. h. hoolock