Polar bear the fourhorn sculpin. With the exception of pregnant females, polar bears are active year-round, although they have a vestigial hibernation induction trigger in their blood. Unlike brown and black bears, polar bears are capable of fasting for up to several months during late summer and early fall, when they cannot hunt for seals because the sea is unfrozen. When sea ice is unavailable during summer and early autumn, some populations live off fat reserves for months at a time, as polar bears do not 'hibernate' any time of the year. Being both curious animals and scavengers, polar bears investigate and
Polar Bear Pass flowering plants. An ecological research station is located on the site. Various studies have been conducted in the area, including those on the endangered Peary caribou by the Canadian Wildlife Service. Currently, the territorial government is funding studies on muskoxen and caribou in the region. Its name is derived from the polar bears that migrate through the region between March and November each year. Polar Bear Pass is an International Biological Program site. It was designated a Ramsar site on May 24, 1982. Polar Bear Pass National Wildlife Area received its designation in 1985. Polar Bear Pass Polar Bear Pass