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Hace 4 días · Most bears, including the American and Asiatic black bears (Ursus americanus and U. thibetanus), eat large amounts of food before entering a den for a period of deep sleep during the winter. The polar bear digs a den in the snow, whereas grizzlies build large mounds of dirt in front of their dens.
Hace 3 días · If the winter is mild enough, they may wake up and forage for food. Females also give birth in February and nurture their cubs until the snow melts. During winter, American black bears consume 25–40% of their body weight. The footpads peel off while they sleep, making room for new tissue.
Hace 4 días · Despite their heavy build and awkward gait, they are adept runners, climbers, and swimmers. Bears use shelters, such as caves and logs, as their dens; most species occupy their dens during the winter for a long period of hibernation, up to 100 days.
Hace 3 días · For each bear winter, we extracted daily estimates of snow depth (cm) and mean daily ambient temperature. We fitted a set of alternative LMMs explaining log-transformed daily movement distance with a nonlinear second-order polynomial term for Julian day and snow depth or mean ambient temperature.
Hace 10 horas · Estimating the population density of vulnerable species, such as the elusive and nocturnal Asiatic black bear (Ursus thibetanus), is essential for wildlife conservation and management. We used camera traps and a Random Encounter Model (REM) to estimate the population density of U. thibetanus during the autumn and winter seasons in the Hindu Raj Mountains. We installed 23 camera traps from ...
Hace 10 horas · 28 April 2022, Kronotsky Reserve, Russia The bear, which had just recently left the den, chased the moose for quite a long time. But after a while, apparently, he got tired, at first he stood ...
Hace 5 días · May 9, 2024 3 AM PT. After another wet winter, record rainfall has turned California green and replenished the state’s reservoirs, which had been perilously low during the worst days of the ...
