Elk (also known as Wapiti, a Shawnee name meaning 'white rump') are an Old World deer species that originated in Eurasia and spread to North America, crossing the Bering Land Bridge during the ice age. North American elk were once considered a separate species, and the Eurasian red deer another species. Scientists now consider the North American Elk and Eurasian red deer to be the same, though distinctions between the two live in in the language. European red deer will interbreed with American elk, when penned together, and the offspring are fertile. (from Wikipedia)

