Panda turns out to be male after keepers thought it was female for FOUR YEARS ...

A male giant panda has been mistaken as female for four years at a zoo in north-east China.

Experts claimed they saw the four-year-old black and white bear, called Pu Pu, lifting its legs and walking backwards through surveillance camera videos and these are  distinctive male behaviour for pandas. 

Pu Pu, which had always been thought as female, was later confirmed to be the opposite sex after suspicious experts ran a checkup on the animals' genitals.   

Giant panda Pu Pu has been mistaken as a female bear for four years until last month

Giant panda Pu Pu has been mistaken as a female bear for four years until last month

Giant panda experts noticed Pu Pu showing signs of masculine behaviour like lifting legs

Giant panda experts noticed Pu Pu showing signs of masculine behaviour like lifting legs

According to Liaoshen Evening Post, Pu Pu was one of the four young giant pandas that got sent to stay in Shenyang Forest Zoo at Liaoning Province eight months ago.

Ms Rong, a carer at the zoo told Beijing News that it was difficult to identify one giant panda's sexuality when it was at a young age.

She reviewed the previous pictures and footages of Pu Pu and could not find any obvious sign indicating the giant panda as male.

In April, experts from the giant panda

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