All macaque species save Barbary Macaques are found in Asia.

Pig-tailed Macaques live in hierarchical mixed-sex groups numbering from 15 to about 40. Females remain in their birth group while males gravitate towards other groups just before they reach sexual maturity at the age of about 5/6 years.
 
This species is very threatened in the wild due to the loss of its habitat to palm-oil plantations, as well as being hunted for the illegal wildlife trade or its meat.