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Grizzly bears hibernate for five to seven months each year [51] (except where the climate is warm—the California grizzly did not hibernate). [6] During this time, female grizzly bears give birth to their offspring, who then consume milk from their mother and gain strength for the remainder of the hibernation period. [52]
While male bears potentially live longer in captivity, female grizzly bears have a greater annual survival rate than males within wild populations, per a study done in the Greater Yellowstone Ecosystem. [138] Annual mortality for bears of any age is estimated at 10% in most protected areas. [56]
This is an accepted version of this page This is the latest accepted revision, reviewed on 12 December 2024. Largest subspecies of brown bears/grizzly bears "Alaskan brown bear" redirects here. Not to be confused with Alaska Peninsula brown bear. This article may be in need of reorganization to comply with Wikipedia's layout guidelines. Please help by editing the article to make improvements ...
U.S. Fish and Wildlife Service biologists captured the bear about 10 miles (16 kilometers) from the Washington-Idaho state line on U.S. Forest Service land. 1st female grizzly in 40 years collared ...
For one, at 28 years old she was "the oldest known reproducing female grizzly bear in the Greater Yellowstone Ecosystem," Hilary Cooley, Grizzly Bear Recovery Coordinator for the U.S. Fish and ...
A single F1 female was the mother of all four backcross individuals, and a single female polar bear was the mother of all four F1s, and thus the grandmother of all four backcross bears. Two male grizzlies mated with the female polar bear to give rise to the four F1s, with one grizzly bear apparently mating with the polar bear in two different ...
Jul. 15—Federal wildlife managers on June 17 captured and collared a female grizzly bear, with three cubs, near Metaline Falls in northeast Washington, about 10 miles from the Canadian border .
"Grizzly bear" is the term used for the brown bear of the North American interior. In 1936, a male polar bear accidentally got into an enclosure with a female Kodiak (Alaskan brown) bear at the U.S. National Zoo, resulting in three hybrid offspring. The hybrid offspring were fertile and able to breed successfully with each other, indicating ...