:32:00
For a family of wolves
:32:02
prey are easier to track
in snow.
:32:23
With jaws powerful enough
:32:25
to crush
the caribou's largest bones
:32:28
they will leave little behind.
:32:53
For a species
that must cooperate
:32:54
to survive, rivalries are brief
:32:57
the leader's dominance
nearly absolute.
:33:12
As the full fury of winter
envelops Alaska
:33:15
temperatures can reach
50 below zero or lower.
:33:26
Elk have learn to change
their diet in winter
:33:29
to feed on only the highest
protein forage available.
:33:38
yet it is a harsh time
for yearlings.
:33:41
Half will not make it.
:33:51
Bison, protected by shaggy hair
over head and shoulders
:33:55
also grow a special winter fur
:33:57
to cover their hindquarters.