Most pumas are a light brown color, with black-tipped ears and tail. The pumas that live closest to the Equator are the smallest, and increase in size in populations closer to the poles. (This sort of size increase is seen in tigers too. The smallest ones live in the tropics, the largest Siberian tigers live far to the north where winters are very cold.) The endangered Florida Panther is the smallest of the Pumas. Like many other cats, they can retract their sharp claws into their paws, which have four toes. The largest male pumas can be as big as eight feet (2.4 meters) long, and females can be as large as seven feet (2.1 meters). The males weigh in a bit less than the average adult human at about 150 pounds (70 kilograms), with females weighing even less at 75 pounds (35 kilograms) or less.
Although pumas do not have a bright pattern, there are distinct black "tearstains" on their upper lips and a vivid white fur around the mouth that emphasizes facial expressions. Although cougars cannot roar, when they growl their "business end" looks rather intimidating, helped along by the markings.