Denver Zoo mourns death of oldest hippo, 58-year-old ‘Bertie’
Denver Zoo was mourning the death on Monday of Bertie, a 58-year-old male hippopotamus who was its longest resident and the oldest hippo accredited to a North American zoo, officials said. Bertie was humanely euthanized after his keepers saw "a significant decline in his quality of life due to his advanced age," the zoo said in a statement. "This is a very sad loss for Denver Zoo and our community. Bert was a member of our family for more than 50 years," zoo President and Chief Executive Shannon Block said.
