AT 27, Inuka, Singapore's last polar bear, had exceeded the average life expectancy of polar bears, which typically live 15 to 18 years in the wild and 25 years under human care.

But he was in failing health. In human terms, he would have been over 70 years old. He had been suffering age-related ailments such as arthritis, dental issues and occasional ear infections for the past five years. A medical examination on April 3 had revealed a significant decline in his health.

His weakening limbs could not support his more than 500 kg weight, leading to him dragging his feet. This had caused ulcerations on his pads that led to deeper infection between his toes.