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Happy, the Bronx Zoo Elephant Who Passed Mirror Self-Recognition Test, Euthanized at 55

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"She touched an 'X' painted above her eye after seeing it in a mirror."

Happy, the Bronx Zoo Elephant, Euthanized at 55

Happy, an Asian elephant who lived at the Bronx Zoo, was euthanized on Tuesday, July 2025, at the age of 55 due to age-related health issues, the zoo announced Wednesday.

Age-Related Decline

Zoo officials reported that some age-related conditions accelerated in recent weeks, with signs of declining kidney or liver function. A necropsy later revealed arthritis and large, inoperable uterine tumors.

A Life in Captivity

Happy was born in the wild in Asia and brought to the United States at age one. She arrived at the Bronx Zoo in 1977.

In 2005, she participated in a landmark study demonstrating that elephants can recognize themselves in a mirror—a sign of self-awareness. She touched an "X" painted above her eye after seeing it in a mirror.

Social History

Happy lived with other elephants until 2006, when her last partner died. After that, she was housed separately from the other two elephants (Patty and Maxine) due to compatibility concerns, though they could see, smell, and touch each other over a divider. Maxine died in 2018.

Currently, Patty (age 57) is the only elephant remaining at the zoo. The zoo's parent organization, the Wildlife Conservation Society, decided in 2006 to stop acquiring elephants. The zoo said it will carefully consider whether to move Patty from her home of 53 years.

Legal Fight for Personhood

In 2018, the Nonhuman Rights Project sued the Bronx Zoo, seeking to have Happy declared a legal "person" and moved to a sanctuary. The New York Court of Appeals rejected the claim by a 5-2 majority, with two dissenting judges calling her captivity "inherently unjust and inhumane." The group has continued similar cases in other states.

Zoo's Final Statement

Zoo officials described Happy as a "wonderful elephant" and an ambassador for elephant conservation. They stated her care included space for swimming, foraging, and other natural behaviors, and that moving her could have caused harm.

In her final weeks, Happy remained in an off-exhibit barn and yard within her enclosure, receiving hydration, nutrition, and pain management.