Brown Bears (Info, Pics and Videos)

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TRUE GRIZZ by Douglas H. Chadwick.

The truth is that no one knows how many grizzlies are scattered through the rugged boondocks they call home on this side of the Canadian line, and it is extremely difficult and expensive to try to find out. Population totals are fashioned from collected hair samples, which provide DNA, plus smaller numbers of actual sightings subjected to large amounts of statistical massage.
Grizzlies may live thirty years or more, crisscrossing home ranges that typically encompass several hundred square miles and occasionally more than a thousand. Even the relative homebodies among them make lengthy forays as subadults dispersing from their mothers' domains. They also make strong shifts in altitude from one season to the next, rambling between thickly forested valley floors and sun-swept tundra meadows just off the peaks. And they may move to entirely new tracts as drought, wildfires, cyclical irruptions of insects, plant disease epidemics, and normal forest succession alter the habitat mix. Reply