Animal biologists in the U.S. state of Wyoming recently confirmed the death of the oldest-known grizzly bear in Yellowstone National Park. Grizzly is another name for the North American brown bear. This bear was 34 years old. Most male bears do not live that long. But he outlived the oldest-known female bears. He was known to park biologists as Grizzly 168. He was first captured and given a tattoo with his number in 1989. Officials made the decision to give the bear a lethal injection because of his poor health. The bear had lost a lot of weight and was killing young farm animals. Healthy male bears weigh about 200 kilograms. This bear only weighed 77 kilograms.