The musk oxen of Canada, Greenland and Alaska defend themselves by forming defensive rings, from the

attacking wolves. Females and the young ones are in the middle of the circle. All the male wall around them

with their horns pointed outside.

If any wolf dares to come close enough, it will be caught by a male and thrown into the circle, using its

horns. The females join in to finish off the wolf by trampling on and stamping it to death.