Rio Mayo titi in deforestation is leading to the decrease in available living space for this titi monkey, forcing it to live in sympatry with another species of "Callicebus". Yet in some areas, such drastic deforestation has resulted in extremely high population density. The Rio Mayo titi is better adapted to moderately populated areas, thus overpopulation negatively impacts the species. The forests the Rio Mayo titi lives in are being destroyed for agricultural purposes, leaving little forest for the monkeys. They were only seen a few times and featured in museums until 2003 when more research was done on them. In order for
Mengkuang Titi People of Mengkuang Titi used to grow rubber, paddy, coconut and oil palm, but now the most of the land was replaced by housing. The only plantation can be found now is oil palm estate. The vegetable crops such as onion, cauliflower, maize etc. was introduce to the village. Mengkuang Titi is one of the village in Penang on the Homestay Programme. There is indeed much to see and do in the kampung. One can walk through a canopy of rubber trees, try a hand at rubber tapping and observe how latex is processed into rubber sheets. Visitors can also