Yellowstone National Park tourists witnessed a heart-breaking scene Sunday involving a subadult male grizzly bear that was savagely attacked by an adult male bear that was courting his mother.
Moments beforehand, the mother bear also attacked the subadult, perhaps in an attempt to scare him away from the boar.
During the subsequent attack by the male grizzly, estimated to weigh more than 500 pounds, the 148-pound, 3-year-old subadult sustained severe injuries and was later euthanized by park staff.
