Thousands of fans have flocked to Thailand's Khao Kheow Open Zoo to celebrate the first birthday of Moo Deng, the baby pygmy hippo that has become a social media sensation.

Thailand's baby pygmy hippo and internet sensation Moo Deng celebrated her first birthday on Thursday, devouring a massive tropical fruit platter alongside her mother as throngs of adoring fans turned up for her four-day party.

Thailand's pygmy hippo Moo Deng marked her first birthday on Thursday, drawing crowds of diehard fans even as she left behind the cute animal infancy that earned her worldwide internet fame.