Two grizzly bears stand on their feet and blow at each other, for a bear seems to try to steal salmon lunch from another bear in a national park in Alaska, U.S.. These rare pictures were taken by a Japanese photographer Shogo Asao who witnessed the scene. (Photo Source: gb.cri.cn)

Two grizzly bears stand on their feet and blow at each other, for a bear seems to try to steal salmon lunch from another bear in a national park in Alaska, U.S.. These rare pictures were taken by a Japanese photographer Shogo Asao who witnessed the scene. (Photo Source: gb.cri.cn)

Two grizzly bears stand on their feet and blow at each other, for a bear seems to try to steal salmon lunch from another bear in a national park in Alaska, U.S.. These rare pictures were taken by a Japanese photographer Shogo Asao who witnessed the scene. (Photo Source: gb.cri.cn)

Two grizzly bears stand on their feet and blow at each other, for a bear seems to try to steal salmon lunch from another bear in a national park in Alaska, U.S.. These rare pictures were taken by a Japanese photographer Shogo Asao who witnessed the scene. (Photo Source: gb.cri.cn)

Two grizzly bears stand on their feet and blow at each other, for a bear seems to try to steal salmon lunch from another bear in a national park in Alaska, U.S.. These rare pictures were taken by a Japanese photographer Shogo Asao who witnessed the scene. (Photo Source: gb.cri.cn)