Abstract
<jats:p>GPS-tagged individuals of reindeer (Rangifer tarandus phylarchus), moose (Alces alces buturlini), snow sheep (Ovis nivicola spp.), and wolf (Canis lupus ssp.) were monitored in the Kolyma region, Russia, between the upper reaches of the Korkodon and Omolon rivers. All ungulates showed seasonal home ranges changing from winter to summer especially concerning that, of reindeer, with cyclical home ranges up to 2449 sq.km (FK95, n=5571). Moose and snow sheep home ranges do not exceed 241 and 45 sq.km (FK 95%). The wolf home range remains stable with an FK95 area estimate of 2333 sq. km. Wolves prefer altitudes from 800 to 1700 m a. s. l. Reindeer in winter choose lowland as well as moose, in contrast to snow sheep. In summer, reindeer move up, while moose mostly stay down. Wolf kills occur once every 7.7 days (68.75% at 800–1100 m a. s. l., and the rest above 1100 m).</jats:p>