WILLIAM ERVIN / SCIENCE PHOTO LIBRARY WILLIAM ERVIN / SCIENCE PHOTO LIBRARY
Grey Wolf. View of a solitary grey wolf (Canis lupus) standing over a deer carcass in the snow. The wolf is snarling, this aggressive display is to defend the carcass. A fully grown grey wolf has a body length of 100-140 cm and a body weight of 18-80 kg. It preys on large herbivores such as elk, bison and mountain sheep as well as deer. The grey wolf lives in packs of 5-15 individuals. It is found mainly in North America and Asia, however there are residual populations in Mexico, Europe and Scandinavia. The grey wolf is an endangered species in all American states except Alaska. Photographed in Utah, USA.
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