20 February 2013Last updated at 13:03

In pictures: Edinburgh Zoo panda Yang Guang prepares for mating

Edinburgh Zoo's male panda Yang Guang is gearing up for the mating season.

Yang Guang arrived in Edinburgh in December 2011 along with his female companion Tian Tian.

On Sunday, Edinburgh Zoo announced Yang Guang was performing "handstands" while scent-marking his enclosure. This would be a demonstration of virility in the wild.

Female pandas are only in season for breeding 72 hours a year, in the spring. Last year zoo keepers said there were encouraging signs between the two, but they failed to mate.