These adorable baby bears look just like they're playing King of the Castle - as they battle to knock each other off a log.
They spent hours at the game, wrestling on top of the tree trunk and pushing one another over like gladiators.
The little grizzly bears bopped each other over the head and even tried to bite one another with their tiny teeth as they practised their fighting skills.
They shuffled backwards and forwards, teetering on the splintered wood as they playfully tried to show who was boss.
Eventually one of the bears managed to shove his brother off the end of the log, leaving him clinging on comically.
The cub, who was just a few months old, even tried to scramble up again but was thwarted by his victorious sibling.
After hours of play, the baby bears wore themselves out and scampered back to their patient mother for tea.
The enchanting scene was caught on camera by photographer Claude Lecours, 49, who was visiting Halo Bay, Alaska.
Claude, a project manager from Beaton, near Toronto, Canada, said: 'It was unbelievable. It was a great thing to see. We arrived just as a film crew were packing up for the day - they said the bears hadn't done anything interesting so they were going home.'
'But no sooner had they left, did these two little bears jump up on the log and started wrestling. They were both trying to knock the other one off, just like they were playing king of the castle.'
'They were only babies, probably just a few months old, so they were practising their fighting techniques. That's what they do at that age. Eventually one of them managed to push the other backwards off the log. He was so excited he even ripped off a bit of bark off and was waving it around like a trophy.'
'But neither of them were hurt and soon enough the cub climbed up and they got right back into it again. After a few hours of playing they got tired and went back to hanging around their mum bothering her. It was amazing to watch - they were very funny.'