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THE first rule of kangaroo fight club is that David Attenborough can talk about kangaroo fight club for BBC documentary Life Story... Mostly because the 'roos themselves wouldn't do such a good job with the voiceover.

They can certainly handle themselves when it comes to the scrapping itself, however.

Eye-gouging and leaping kicks add to the anything goes atmosphere when two kangaroos clash - but the marsupials' ability to lean back on their tails gives them a little extra spring to their stomps to the nethers.

But which kangaroo is the most dominant? There's only one way to find out...

Elsewhere on tonight's show, the incredible aim and discipline of the archer fish is displayed.

Known for preying on land-based insects and even small animals, the fish knock their targets off balance and into their watery environment by firing a gush of droplets at them.

* Life Story is on BBC One tonight at 9pm