Britain's only male giant panda has started showing signs of readiness to mate.
Yang Guang (Sunshine) recently began doing handstands against trees, walls and rocks, and scent-marking as high up as possible - known as displays of virility in the wild.
Experts at Edinburgh Zoo are now hoping Yang Guang and the female Tian Tian (Sweetie) could be ready to mate within the next month.
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