NOTE TO PICK DESK - PERMISSION GIVEN FROM EACH PERSON TO USE IMAGE (PICTURES: THE WORLDS HAPPIEST ANIMAL POSES FOR SELFIES WITH PEOPLE IN AUSTRALIA) The world is going QUOKKAS for quokkas, an adorable Australian marsupial which just happens to be the perfect selfie partner. The tiny mammal - which is about the size of a small cat - is under threat in the wild Down Under but has become a magnet for picture hunting tourists and Aussies alike. Quokkas main stronghold is Western Australia particularly on Rottnest Island just off Perth where they are safe from the predators on the mainland. Their seeming good nature and ability to look at a camera with a human-like smile has made them a hit with visitors to the region. SEE MERCURY COPY