Javan rhinoceros, an endangered species, is officially extinct in Vietnam.
The last of its kind was killed at the Nam Cat Tien National Park in April last year.
It was shot dead for its horn, said WWF at a joint press conference with the International Rhino Foundation in Hanoi on Tuesday.
WWF said the 58kg body had a bullet in its leg.
The mammal’s sex is not known but its teeth and bones indicate it was 15 to 20 years old.
“It is painful that conservation efforts failed to save this unique animal,” said Tran Minh Hien, WWF-Vietnam country director.
This critically endangered species is now believed to have a population of less than 50 on the island of Java, Indonesia.
The Javan rhinoceros was believed to be extinct in mainland Asia until an individual was killed by hunters in Vietnam’s Cat Tien region in 1988.
This led to the discovery of a small population that by 2007 had only 8, according to a Guardian report.
In 1990s, Vietnam established the Nam Cat Tien National Park to safeguard the rhino and ensure its food sources.
But the Javan rhinos were always threatened by illegal hunting and poachers, as their horns, skin and dung are highly valued in traditional Chinese medicine.