Name: Proboscis Monkey (Nasalis larvatus) Aka Long-nosed Monkey
Range: Endemic to Borneo Occurring in Brunei Darussalam, Indonesia (Kalimantan) and Malaysia (Sabah and Sarawak)
Distinguishing Feature: A very, very large nose (Males) Pot Belly
Status: Endangered in the IUCN Red List of Threatened Species Listed in Appendix I of CITES
Lifespan: >25 Years (Captive)
Size (Sexual Dimorphism)
- Head-body length: 73 – 76 cm
- Tail length: 66 – 75 cm
- Weight: 16 – 22 kg
- Head-body length: 54 – 64 cm
- Tail length: 52 – 62 cm
- Weight: 7 – 12 kg
Richardson, M. (2006) Pers. comm.
Proboscis monkeys are generally folivore/frugivores, with their diet, comprising of over 90 species of plants. (Salter et al. 1985; Boonratana 1993; Yeager 1989a).
They prefer young leaves and unripened non-fleshy fruits. With their diet changing along with the seasonal availability of food sources (Yeager 1989).
Fruits (40.33%), Flowers (2.97%), Leaves (51.94%), Insects and bark (<1%), Unknown foods (4.68%) (Yeager 1989a).