The grizzly bear, a North American
sub-species of the brown bear, once ranged from Alaska to Mexico, and
across the prairies to the east. Human settlement, however, has driven
it into remote, mainly northern habitats. Grizzly bears in the extreme
north can survive on the icy, treeless sedge lands of the tundra. Populations are greater in woodlands and forests, especially where there
are plenty of river valleys and open, grassy areas. Today, national
parks provide the grizzly with refuge.
grizzly is well-suited to its cold habitat. Its vast bulk, augmented
in winter with a layer of fat, lets it tolerate extreme cold and also helps
the grizzly charge through knotted undergrowth in the thick forests.