DENVER (KDVR) -- A beloved and internationally known 32-year-old Sumatran orangutan was humanely euthanized surrounded by the people who loved him most at the Denver Zoo Conservation Alliance on Monday.

In 2024, Berani was diagnosed with kidney disease, which progressed to late-stage kidney failure earlier this year, meaning his organs could no longer function on their own, the zoo said.

Recent bloodwork showed that he had entered end-stage kidney failure, with a noticeable decline in health and quality of life. So the zoo's Animal Care and Health teams decided to humanely euthanize him to prevent any suffering, the zoo announced Tuesday.

Caregivers said that Berani taught them a lot about orangutan behavior and redefined what is known about parental care in orangutans. On top of being

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