National Geographic USA - 09.2019

The wolves keep three
male muskoxen in their
sights. To kill one of
these animals, which
can weigh up to 650
pounds, the pack must
learn to cooperate.
Muskoxen are one of
the few prey animals
that work together
to form a defensive
line. The wolves look
for opportunities to
isolate one muskox
from the protection
of the herd. These
muskoxen deterred
the threat.