The attack is on! To intimidate their opponents,
the aggressors scream and drum on buttress roots.
Several males corner an enemy female.
It's a ferocious attack and she's lucky to escape with her life.
Others are not so fortunate.
The battle won, a grizzly scene unfolds.
An enemy youngster has been caught and killed.
The carcass is shared between members of the group and eaten.
Killing a competitor makes sense if you want to protect your food supply.
But exactly why they cannibalise the dead chimp is not fully understood.
It may simply be a chance for some extra protein.
Teamwork has brought this group of chimps great success,
but they'll soon reach the limits of their power.
The competition for resources ensures that no one species dominates the jungle.
The rainforests' great diversity has come at a cost.
It has made them the most finely balanced ecosystems in the world,
only too easily upset and destroyed by that other great ape, the chimpanzee's closest relative, ourselves.