This primate of Indonesia is the only ape whose name begins with an "O"
It has been named the "Roger O. and Barbara E. Brown Primate 
Research .... information on the hoolock gibbon (Hylobates hoolock), the only 
living ape in .... an important door to the outside world for landlocked Laos, 
whose only route to... [DOC] [TLE] Orangutans | WWF [PAR] But their forest habitat in Indonesia and Malaysia is rapidly disappearing, putting 
the future of Asia's only great ape in peril.