His name was Pan Pan, and he was the worlds oldest male panda. He was almost singularly responsible for taking his species from being endangered, to only being “vulnerable.”
Pan pan was considered a “natural breeder” by scientists, especially for being part of a species that is notoriously hard to breed. Female pandas only ovulate once a year, and the male has less than two days to fertilize the egg. Yet Pan pan was ancestor to more than 130 descendants, 25% of pandas in captivity are related to him.
He died of a cancer, and was over 100 years old in panda years.