Two young grizzly bear siblings playfully attack each other on the banks of the Chilkoot river in Alaska. The adolescent bears need to practice their fighting skills before heading out to survive in the wild. Grizzly bears attack each other from time to time over territory, to protect their cubs, or over a mutually desired mate.
This photograph of grizzly bears attacking each other was taken in the Alaskan backcountry. While grizzly bears are an endangered species in the lower 48 United States, there is a thriving population of the animals in Alaska.
Stock Image #20100923-121540C