Cervus canadensis

f6.7 @ 1/1000s, ISO:3200, Nikon D3S w 500mm and 1.7X teleconverter

"Elk," Wikipedia, the free encyclopedia. Elk cows average 225 to 241 kg (496 to 531 lb), stand 1.3 m (4.3 ft) at the shoulder, and are 2.1 m (6.9 ft) from nose to tail.
Estes Park, Rocky Mountain National Park, Colorado