Daniel J. Cox / Gray Wolf (Canis lupus) predating female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 4 of 4

Daniel J. Cox / Gray Wolf (Canis lupus) killing female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 3 of 4

Daniel J. Cox / Gray Wolf (Canis lupus) attacking female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 2 of 4

Daniel J. Cox / Gray Wolf (Canis lupus) pair predating female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 1 of 4

Daniel J. Cox / White-tailed Eagle (Haliaeetus albicilla) hunting, Hokkaido, Japan

Daniel J. Cox / Gray Wolf (Canis lupus) pack on ridge in winter, Lamar Valley, Yellowstone National Park, Wyoming

Daniel J. Cox / Windmills on ridge at sunset, France

Daniel J. Cox / African Elephant (Loxodonta africana) mothers and calves in grassland at sunset, Masai Mara, Kenya

Daniel J. Cox / Snowy Owl (Nyctea scandiaca) female carrying Spectacled Eider (Somateria fischeri) prey, Alaska

Daniel J. Cox / Polar Bear (Ursus maritimus) male feeding on cub he caught and killed from cub's mother, Manitoba, Canada

Daniel J. Cox / Ostrich (Struthio camelus) father with chicks, Masai Mara, Kenya

Daniel J. Cox / Pine (Pinus sp) tree in winter, Hayden Valley, Yellowstone National Park, Wyoming