Grizzly bears, reaching up to 8 feet tall and weighing as mush as 800 pounds, have almost no natural enemies. The average Grizzly can run at 35 mph. There are about 50,000 living in North America, 30,000 of which live in Alaska. Grizzly bears are immensely strong, a full grown adult can easily lift 500 pounds. They eat almost anything available.
Adult Asian Black bears weigh 130 to 440 pounds, and 4.5 to 5.4 feet tall. It is known for a light brown muzzle and a distinct whitish patch on its chest. Three subspecies of Asian Black bears live in China. They are typically good climbers, but when they become older many are too heavy too climb trees. Asian Black bears are omnivorous, meaning they will eat vegetation as well as some meat.
Currently, there are about 600,000 American Black bears. They are 5 to 7 feet tall and weigh 90 to 660 pounds. The record weight for an American Black bear was 901 pounds. This bear prefers mountainous regions, but can also be found in meadows and wetlands. If you stood 18 to 20 miles away from one, it could locate you.
Polar bears have a bite force of 1200 PSI. Polar bear fur is white, but its skin is actually black. It is possible to extract Polar bear DNA from as little as their footprint. The United States of America, Canada, Norway, and Denmark, signed an agreement to protect Polar bears, in 1973. They are 7 to 8 feet tall and weigh 900 to 1600 pounds.