Life across continents

From the depths of the South American jungles to the frozen peaks of Asia, a new BBC nature series co-produced with Chinese partners is now being aired, Xu Fan reports.

On an icy corner of Antarctica, two male elephant seals are violently biting and crashing into one another to compete over the mating rights of the 60 or so females.

For most people, it's such a rarely-seen sight that they would have the chance to encounter at such close quarters.