By Kristiana Hall
Say chimpan-cheese! These primates know how to strike a pose as they smile, wink and even swear at the camera in this hilarious set of snaps.
The funny pictures, taken by a host of photographers from around the world, show a real group of cheeky monkeys playing up to the camera and almost impersonating humans with their comic timing.
Several primates can be seen sporting cheesy grins, while one particularly angry gorilla lifts its middle finger and swears at the photographer.
A mountain gorilla sticks a finger up its nose – giving the snapper a unique photo opportunity, while an orangutan has its own mini protest by putting its fingers in its ears.