Grizzly bears are only found in North America and are a subspecies of the brown bear. The only times grizzly bears are seen together are when mothers are with their cubs and when groups of grizzlies gather in the summer to catch salmon during their spawning season. Grizzlies hibernate in the winter in dens. This time is when females give birth to their cubs.
Grizzly bears get their name from the white tips occasionally found on their fur, which appears grizzled. They grow as tall as 8 feet and weigh up to 800 pounds. They are omnivores, living primarily off of nuts, berries, fruit, leaves, insects, fungi and roots. They also eat fish, rodents, sheep, elk and sometimes moose. Grizzly bears consume the most during the warmer months to prepare for hibernation in the winter. They may eat as much as 90 pounds of food each day, gaining over 2.2 pounds of body weight per day. Grizzly bears can run up to 30 miles per hour despite their massive size. It is very dangerous to come into close contact with a grizzly bear, especially if a mother grizzly feels that her cubs are being threatened. As of 2014, there are only around 1,000 grizzly bears alive in the North American continent, and hunters in Canada and Alaska still pursue grizzlies for big game trophies.