British photographer Jules Cox snapped the brown bears chasing each other up tall pine trees
Mr Cox, who has spent four seasons with the bears, saw them racing up the trees and hanging on to branches.
The photographer, from Brighton, hid in the woods so he could catch the bears in their most natural form.
He said: ‘It was an amazing sight to see the cubs climbing the tree.
‘They have amazing climbing skills even at such a young age.