Grizzly bears are very strong and large animals. Their size and weight are variable depending on the availability of food, and the climatic conditions. The adult bears stand approximately 100 cm tall on all four legs. Their body length is just over 200 cm, and their weight is variable, normally anywhere from 330 to 825 pounds. Grizzly bears have heavy stout bodies with strong muscular legs. They have a big head, short tail, small rounded feet and ears, and hind feet with five toes each. The grizzlies have a distinctive muscular shoulder hump, and the claws on the front paws are large, strong and slightly curved. The claws are brown and are used mainly to dig food, ground squirrels and mice. The length of the front claws are often 9 cm long. The grizzlies are covered with heavy shaggy fur. There are many different color phases including black cinnamon, red, blond or a mixture of these colors. These bears got the name grizzly from the silver tipped grizzly hair that the bears develop when they are older.
Grizzly bears are usually peaceful animals. They try to avoid a fight and run from danger, but they are short tempered and get angry easily and quickly. They are fierce fighters and will attack anything that seems to threaten them or their cubs, food or home. The grizzly is a very protective animal. They will become violent if their cubs are attacked. If it is cornered or attacked, it can be very dangerous.