The lion-tailed macaque is one if the rarest primates.

Here also lives rare primates like pottos, and greater bushbabies.

The species is one of the least known and possibly rarest Neotropical primates.

Two security guards at the Philadelphia Zoo have been suspended because of a fire on Sunday that killed 23 rare primates, the zoo said today.

After exploring the coastline, head inland for the thick jungles, home to the tarsier, a tiny, rare and endangered primate.

Proboscis monkeys are the rarest primates on earth as they are only found on the island of Borneo.

It was perfectly possible that a rare, reclusive primate might exist in the jungle depths.

It is currently classified as critically endangered and is one of the rarest primates in the world with only 6,000 individuals left in the wild.

Francois' langurs, a rare primate, use their rock-climbing skills to enter caves at night for protection.

I realized that looking for sleeping caves would be my key to finding the Cat Ba, or golden-headed, langur, perhaps the rarest primate on earth.