PhD student Jo Leen Yap and a group of passionate volunteers are working together to help protect an endangered primate, known as the dusky langurs.

Jo Leen set up Langur Project Penang in 2016 which has developed into a citizen science project.

WATCH MORE: https://thestartv.com/c/news
SUBSCRIBE: https://cutt.ly/TheStar
LIKE: https://fb.com/TheStarOnline