A lynx is any of the four species within the medium-sized wild cat genus Lynx. The name originated in Middle English via Latin from the Greek word lynx, derived from the Indo-European root leuk-, in reference to the luminescence of its reflective eyes. Lynx have a short tail, characteristic tufts of black hair on the tips of their ears, large, padded paws for walking on snow and long whiskers on the face. Under their neck, they have a ruff, which has black bars resembling a bow tie, although this is often not visible. Body color varies from medium brown to goldish to beige-white, and is occasionally marked with dark brown spots, especially on the limbs. All species of lynx have white fur on their chests, bellies and on the insides of their legs, fur which is an extension of the chest and belly fur.