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

Thousands of visitors gathered at a zoo in Thailand on Thursday to celebrate baby pygmy hippo Moo Deng’s first birthday, months after social media videos of her antics made her a viral internet sensation.

Moo Deng, a pygmy hippo who became an internet sensation, marked her first birthday on July 10, 2025 in Thailand.