
Cat Ba langur is the rarest primate in Asia, known to live only on Cat Ba Island, Hai Phong
The Cat Ba Langur Conservation Project is  carried out on Cat Ba Island, a relatively primitive island district of  Hai Phong City.  
Nguyen Huy Cam, deputy head of the Cat Dua rangers of Cat Ba National  Park, said the Cat Ba langur is the rarest primate in Asia, known to  live only on Cat Ba Island. There are only about 60 Cat Ba langurs  scattered in the limestone mountains that run along the coast in Cat Ba  National Park. 
 Mr Cam said “Cat Ba langurs live in the limestone mountains and eat  various plants that grow on the cliffs. They usually sleep at night on  the cliffs in caves, in the daytime eating and hanging out in the  valley.”
 To protect the species, the Cat Ba rangers have teamed up with local  people who live in the buffer zone of the park to conduct regular  patrols, destroy poachers’ traps, and keep a close protective watch on  each langur.
“Langurs reproduce all year round but deliver only one offspring at a  time. Langurs can sit quietly and not move for hours, so we have to be  patient enough to wait for them to return to their sleeping caves so we  can count them,” Cam explained.
Neahga Leonarg, Director of the Cat Ba Langur Conservation Project, said  that the Cat Ba langur has genetic characteristics similar to the  white-headed langur of Southern China, from which it split off millions  of years ago, evolving to adapt to living in rugged limestone mountains.  Cat Ba langurs are shy of humans, and might move from their cave to  another place if they hear a strange sound miles away. The project must  contend with many difficulties: the rugged terrain, poor public  awareness, and economic and tourism activities which adversely affect  the environment.
Cat Ba National Park is working with a number of foreign organizations  to stabilize the langur population through increased communication to  prevent poaching, set up a protected zone to ensure an appropriate  habitat for the species, and increase the langur’s rate of reproduction.
Hoang Van Thap, the Director of Cat Ba National Park, said “Since Hai  Phong City completed a detailed plan for a langur protection zone, our  protection has been much more effective. Activities of locals have been  restricted. Cat Ba Archipelago is rich in biodiversity. We should do all  we can to preserve our natural heritage, minimize the impact of tourism  and other activities, and see that socio-economic development respects  and conserves nature.”
The Cat Ba Langur Conservation Project began in late 2000, sponsored by  the Zoological Society for the Conservation of Species and Populations  (ZGAP) and Germany’s Münster Zoo. Two models, called “Langur safeguards”  and “the Forest Protection Club” have been successfully implemented in  the communes of Cat Ba Island.