These smiley little fur balls are definitely not camera shy! They’re mammals called quokkas (KWAH-kuhs). About 12,000 quokkas roam freely on Rottnest Island, off the west coast of Australia. They aren’t afraid to walk right up to visitors who want to take selfies with them.

Quokkas’ friendly grins have led many people to call them the world’s happiest animals. Local officials ask that tourists avoid petting or feeding quokkas. But they say there’s no harm in striking a pose with them!

Like kangaroos, quokkas are marsupials. That means mothers carry their young in pouches. Can you spot the baby quokka in one of the photos?