A lone arctic wolf has a better chance of killing large prey by running alongside it and attacking its neck.
From the en.wikipedia.org
Muskoxen and barren-ground caribou are the only large herbivores in this environment, while polar bears and the arctic wolf are the only large carnivores to be found in the region.
From the en.wikipedia.org
Gilles also has his own wolf park, which is home to 16 arctic wolves living in two hectares of outdoor enclosures.