Grizzly Bear:

The Grizzly Bear is any North American subspecies of the brown bear, including the mainland grizzly actors , the Kodiak bear , the peninsular grizzly and the recently extinct California grizzly and Mexican grizzly bear . Specialists sometimes call the grizzly the North American brown bear because the grizzly and the brown bear are one species on two continents.In some places, the grizzly is nicknamed the silvertip bear for the silvery, grizzled sheen in its fur. cubs are threatened.

Source:Wikipedia