These bears which can weigh up to 500 pounds are only found in North America, ranging from Alaska to Florida. While grizzly bears will kill people in defense of their cubs, black bears have never been known to do this. However, if you find a black bear do not try to feed her, and do not leave trash in the woods. Black bears can become dangerous when they learn to expect food from humans, and are sometimes killed as a result. So don’t risk your life or that of one of these bears by feeding them or enticing them to come to you.