Mountain hare lives at elevations from 700 to 3800 m, depending on biographic region and season. The mountain hare is a large species, though it is slightly smaller than the European hare. It grows to a length of , with a tail of , and a mass of , females being slightly heavier than males. In summer, for all populations of mountain hares, the coat is various shades of brown. In preparation for winter most populations moult into a white (or largely white) pelage. The tail remains completely white all year round, distinguishing the mountain hare from the European hare ("Lepus europaeus"),
Domestic rabbit generally, especially domestic ones. More recently, the term "kit" or "kitten" has been used to refer to a young rabbit. A young hare is called a "leveret"; this term is sometimes informally applied to a young rabbit as well. A group of rabbits is known as a "colony" or a "nest". The study of rabbit genetics is of interest to fanciers, the fiber & fur industry, medical researchers, and the meat industry. Among rabbit fanciers, the genetics of rabbit health and diversity are paramount. The fiber & fur industry focuses on the genetics of coat color and hair properties. In