Donna the Nile hippopotamus lived at Mesker Park Zoo in Indiana for over five decades.
Normally hippos live for only 40 years in the wild and up to 50 years in captivity, Donna was unique because she had lived for more than 10 years over her life expectancy and was the oldest living hippo in the world. A popular attraction at the zoo, Donna had given birth to 8 offspring throughout her life and will be greatly missed by staff and visitors alike.
"It is with great sadness for us to announce that Donna, the world’s oldest living Nile hippopotamus in captivity, was humanly euthanized this morning due to her declining quality of life caused by her debilitating severe arthritis," the zoo director said in a statement.
"Donna, the world’s oldest Nile hippo in captivity, who gave birth to 8 babies and lived through 15 presidential elections, died this week at 61."
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