In larger protected areas, researchers also found a greater variety of diets including carnivores, herbivores and species that favour fruit, such as these southern pig-tailed macaques photographed in Indonesia.

Southern Pig-tailed Macaque or Beruk, Macaca nemestrina (Northern Malaysia and southern Thailand to Borneo and western Indonesia)

The animal is Macaca nemestrina, a light brown southeast Asian monkey, commonly known as the pigtail macaque.

The Macaca nemestrina, called the pigtail macaque because of its short, curly tail, is about knee-high on all fours.

In the pigtail monkey (Macaca nemestrina) the most dominant male reduces the amount of fighting within his troop by policing any fights that break out.

The southern pig-tailed macaque (Macaca nemestrina) is a medium-sized Old World monkey.

Southern pig tailed macaque (Macaca nemestrina)

The coconuts are often picked from the tree by specially trained monkey, mostly Pig-tailed Macaques (Macaca nemestrina).

ARKive - images and movies of the Sunda pig-tailed macaque (Macaca nemestrina)

The parasite was identified in a pig-tailed macaque (Macaca nemestrina) that Eyles purchased in peninsular Malaysia in mid-August 1960.

Southern Pig-tailed Macaque or Beruk, Macaca nemestrina (Northern Malaysia and southern Thailand to Borneo and western Indonesia)

P. knowlesi infection is normally considered a parasite of long-tailed (Macaca fascicularis) and pig-tailed (Macaca nemestrina) macaques but humans who work at the forest fringe or enter the rainforest to work are at risk of infection.

With 123 bird species, Hylabates mueleri, Macaca nemestrina, Presbytus rubicunda, Macaca fascicularis, Susvittatus, Squiler, Corvus unicolor, Bukit Bangkirai has also endemic Black Orchid (Coelogyne pandurata) among 45 kinds of orchids.