Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in many parts of the world. There are seven different genera in the family classified as rabbits, including the European Rabbit (Oryctolagus cuniculus), cottontail rabbits (genus Sylvilagus; 13 species), and the Amami Rabbit (Pentalagus furnessi, an endangered species on Amami Oshima, Japan). There are many other species of rabbit, and these, along with cottontails, pikas and hares make up the Order Lagomorpha. Rabbits generally live for about 4-10 years. A rabbit's gestation period is 31 days.