This makes Arctic wolf movement hard to research. It is proposed to be the smallest of all Arctic wolf types. They are preyed on by the snowy owl, Arctic fox, Grizzly bear, and Arctic wolf. The recovery of the Arctic wolf population came when summer weather conditions returned to normal. They are able to outrun the Arctic wolf, their main predator, and are good swimmers. The major predator of barren-ground caribou is the Arctic wolf ("Canis lupus arctos").