| movements of wolves at the northern extreme of the species' range, including during four months of darkness. | information about wolf (canis lupus) movements anywhere near the northern extreme of the species' range in the high arctic (>75°n latitude) are lacking. there, wolves prey primarily on muskoxen (ovibos moschatus) and must survive 4 months of 24 hr/day winter darkness and temperatures reaching -53 c. the extent to which wolves remain active and prey on muskoxen during the dark period are unknown, for the closest area where information is available about winter wolf movements is >2,250 km south. w ... | 2011 | 21991308 |