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based on surveys taken in the mid-1990s in seven Canadian provinces, though this estimate excludes black bear populations in New Brunswick, Northwest Territories, Nova Scotia, and Saskatchewan.All provinces indicated stable populations of black bears over the last decade.Despite this, black bears in those areas seem to have expanded their range during the last decade, such as with recent sightings in Ohio though these probably do not yet represent stable breeding populations.
However, both Arctodus and Tremarctos had survived several other ice ages.
After these prehistoric ursids became extinct during the last glacial period 10,000 years ago, black bears were probably the only bear present in much of North America until the migration of brown bears to the rest of the continent.
In 1859, a black bear and a Eurasian brown bear were bred together in the London Zoological Gardens, but the three cubs died before they reached maturity.
In The Variation of Animals and Plants under Domestication, Charles Darwin noted: In the nine-year Report it is stated that the bears had been seen in the zoological gardens to couple freely, but previously to 1848 most had rarely conceived.
In the reports published since this date three species have produced young (hybrids in one case), ...
A black bear shot in autumn 1986 in Michigan was thought by some to be a black bear/grizzly bear hybrid, due to its unusually large size and its proportionately larger braincase and skull.
The adaptation to woodlands and thick vegetation in this species may have originally been due to the black bear having evolved alongside larger, more aggressive bear species, such as the extinct short-faced bear and the still living grizzly bear, that monopolized more open habitats and the historic presence of larger predators such as smilodon and the American lion that could have preyed on black bears.
Although found in the largest numbers in wild, undisturbed areas and rural regions, black bears can adapt to surviving in some numbers in peri-urban regions as long as they contain easily accessible foods and some vegetative coverage.
It has one of the longest hibernation periods of any bear in North America.Tags: Adult Dating, affair dating, sex dating