Who's excited for #NationalHippoDay? Weighing around 300 lbs, Tony continues to grow, but wild populations of hippos are declining. These formidable grazers act as important fertilizers for African ecosystems, but are Vulnerable due to habitat loss & illegal wildlife trafficking. We're proud to work with the Species Survival Plan (SSP) to maintain a genetically healthy population of river hippos in North America. #HipHippoHooray #waterhorse #sandiegozoo #endextinction