PIC FROM Mike Rodenburg / Caters News

PICTURED: The gorilla with its middle finger stuck up at Amsterdam zoo.

PIC BY BOB PITCHFORD / CATERS NEWS

Pictured: The grumpy gorilla, annoyed by having pictures taken of him, decided to stick his middle finger up at the photographer at Bristol Zoo.

PIC FROM Caters News

Pictured: A gorilla at Bristol Zoo holds it middle finger up at accountant Ben Collins at Bristol Zoo

PIC BY INGO GERLACH / CATERS NEWS

PICTURED THE GRUMPY GORILLA at the Appeldoorn Monkey Park in Holland

Pic by THE GOFER / Caters News

Pictured: The cheeky chimp Flips the bird at the photographer at Kibale Forest, Uganda.