Berani, the Denver Zoo’s 32-year-old Sumatran orangutan, was euthanized on Monday.

He has been suffering from kidney disease for months, and his kidneys recently failed.

Berani willingly participated in his health care in his final months — a rarity among animals.

“Despite his kidney disease, he was incredibly tolerant and brave during his every-other-week blood draws,” said animal care specialist Kirstin Prunchak, in a statement. “It was a testament to his trust and resilience.”

Berani moved from the Audubon Nature Institute to the Denver Zoo Conservation Alliance in 2017. A couple years later, he and his late partner Nias had a daughter, Cerah. Nias passed away when her daughter was an infant, and Berani defied expectations and stepped into the role of single dad.

Zoo staff and Bera

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