Lutungs are a group of old-world monkeys that includes 17 species of lutungs, dusky langurs and leaf monkeys. These long-tailed monkeys live in groups in the tropical forests of south east Asia. A single male presides over a harem of females and when he is deposed his offspring are in grave peril. A multi-chambered stomach aids digestion of all the tough plant material these monkeys eat. The main culprit for the endangered status of many lutungs, critical in a few, is deforestation.
Scientific name: Trachypithecus
The shading illustrates the diversity of this group - the darker the colour the greater the number of species. Data provided by WWF's Wildfinder.