Remarkable new film of wild pandas shows how the rare bears engage in some gymnastics to mark their territory. Pandas can adopt four distinct postures to deposit scent, with probably the strangest being the handstand. The bear goes upside down on its front paws with the aim of pushing its urine as high up a tree trunk as possible. The amazing pictures were taken in the Quingling mountain range of north-west China, and will be shown on BBC One's Bears - Spy In The Woods programme. It is said to be the first time wild pandas have been filmed in...