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Moo Deng, a pygmy hippo and internet sensation, celebrated her first birthday at Thailand's Khao Kheow Open Zoo. The event drew international fans, including one who flew from New York. Moo Deng, whose name means "Bouncing Pig," remains unfazed by her fame, enjoying watermelon and naps. Her popularity has quadrupled zoo attendance and raised awareness for endangered pygmy hippos. Moo Deng's image is trademarked, and merchandise featuring her is available.

Prepared by Emily Rhodes and reviewed by editorial team.