Magawa, an African rat hero who became famous for finding over 100 landmines in Cambodian countryside and receiving a gold medal for his efforts, died at the age of eight.
Magawa died "peacefully," according to a statement from the Belgian charity APOPO, which trained him.
"All of us at APOPO are feeling the loss of Magawa," the organisation said, expressing gratitude for the hero's work over the years.
Over the course of his career, Magawa, a huge African pouched rat from Tanzania, helped eliminate mines from 225,000 square metres of ground, the equivalent of 42 football fields.
After locating more than 100 landmines and other devices, Magawa retired in June last year.
Magawa was said to be in good health and spent the majority of last week on the field.
However, "he began to slow down, resting more and displaying less interest in food in his final days," according to the organisation.
APOPO bribed Magawa with delectable gifts to teach him how to detect chemical components in bombs, his favourites being bananas and peanuts.
He would use "his remarkable sense of smell" to alert oppressors by scratching the ground.
Because of his remarkable ability for detecting landmines and deadly ordnance, the rodent got the animal equivalent of Britain's highest citizen accolade for bravery in September 2020.
In the 77-year history of the awards, Magawa was the first rat to earn a medal from the British veterinary charity PDSA.
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