Frozen Planet - E1 to the end of the earth S9

1. Frozen Planet - S01 - E01 - To The Ends Of The Earth - Part 09.mp3

But even small trees can provide cover for a predator.

Wolves. These, in northern Canada, are the largest and most powerful in the world and they are setting out to hunt.

The pack is 25 strong, a sign that the prey they are seeking is formidable.

These bison are even bigger than their southern cousins and the largest land animals in North America.

For generations, wolves and bison here have been shaped by their battles with each other, 

making each the most impressive of its kind.

The bison will not stay long among the trees. They’re not safe here.

The wolves are closing in, but their chance of ambushing the bison in the woods has passed.

Their prey are now in the open and grouped together for safety.

The wolves will need to work as a team if they are to make a kill.

They circle the herd, trying to unsettle it and split it up. But the bison are armed and dangerous.

The wolves up their game, harrying the herd, a ploy to trigger a stamped and split away one of the smaller ones.

The bison form a defensive circle around their young, horns pointing outwards.

The wolves need a bison to break rank.

But the tables are turning and now the wolves have to retreat.

The pack focus their attention on the rear of the herd and the bison begin to panic.