Happy, a 55-year-old Asian elephant at the Bronx Zoo, was euthanized due to age-related health issues, including kidney and liver function decline, arthritis, and large, inoperable uterine tumors. Happy was notable for her role in a 2005 study that demonstrated elephants' ability to recognize themselves in mirrors, a sign of self-awareness shared by only a few species. Born in the wild in Asia, she arrived at the zoo at just one year old and lived there for nearly half a century. Happy became a focal point in animal rights discussions, especially following a lawsuit by the Nonhuman Rights Project, which sought to have her declared a 'person' and moved to a sanctuary. However, the New York court rejected the claim. With Happy's passing, Patty is now the last elephant on display in New York City, as the zoo's parent organization, the Wildlife Conservation Society, has chosen not to acquire more elephants since 2006. The zoo plans to carefully consider Patty's future, as she has been a resident for 53 years.