The cougar's Latin name gives a clue to its appearance; �concolor� means with one color, and adult cougars' fur is a uniform red-brown or gray-brown. Cougars have long, slender bodies with very long tails and broad, round heads with erect, rounded ears. Adult cats average from 6 feet (females) to 8 feet (males) long, including their tail. Males, at around 140 pounds, are larger than females at about 105 pounds. Cougars can swim, climb trees, and leap horizontally and vertically equally well. Eastern cougars' primary prey was white-tailed deer, but they also hunted eastern elk (now extinct) and porcupines and other smaller mammals. The eastern cougar (Puma concolor couguar) once roamed the eastern United States from Maine to South Carolina and west from Michigan to Tennessee. The U.S. Fish and Wildlife Service has for years presumed the eastern couger was extinct, having no verifiable evidence, such as DNA, to the contrary. Although many people have seen cougars in the East, and some have taken photographs, the animals sighted may not be the subspecies known as the eastern cougar.