The term “Pig Tail Monkey” commonly refers to the Pig-tailed Macaque, which is a type of monkey belonging to the genus Macaca. There are two main species within this category:

1. *Northern Pig-tailed Macaque (*Macaca leonina)**: Found in parts of South Asia and Southeast Asia, including Thailand, Cambodia, Laos, Vietnam, and Myanmar.

2. *Southern Pig-tailed Macaque (*Macaca nemestrina)**: Inhabits parts of Malaysia, Indonesia, and other regions in Southeast Asia.

These macaques are known for their distinctive short tails, which resemble a pig’s tail, hence their name. They are generally arboreal but also spend a significant amount of time on the ground. They are omnivorous, feeding on fruits, seeds, leaves, and small animals. Pig-tailed macaques live in social groups with complex hierarchies and communication methods.