Purple-faced Langur - Taxonomy

Taxonomy

There are four distinct subspecies of purple-faced langur:

• Southern lowland wetzone purple-faced langur, Trachypithecus vetulus vetulus
• Western purple-faced langur or North Lowland Wetzone purple-faced langur, Trachypithecus vetulus nestor
• Dryzone purple-faced langur, Trachypithecus vetulus philbricki
• Montane purple-faced langur or Bear Monkey, Trachypithecus vetulus monticola

All four subspecies exhibit different cranial and pelage characteristics, as well as body size. They are one of the 25 most endangered primates in the world. Most groups of langurs contain only one adult male.