The rabbits are mammals from the Rodent order. They are distinguished by their long ears and long hind legs, but have very short tails. On the upper jaw they have two pairs of incisors and one pair on the lower jaw. The body is covered in soft fur. There are 10 documented genera of rabbits, distributed almost throughout the entire dry land surface of the planet. In Australia and on some islands the rabbits were brought by humans (the European rabbit for example). Rabbits have various habitats and are herbivores – they eat grass, leaves and tree bark. Rabbits are very fertile. Every year they produce several litters of 7-8 or more bunnies. The domesticated rabbits descend from the European or Common rabbit (Oryctolagus cuniculus), which originated in Southern Europe, and have litters of 6-7 bunnies 4-5 times a year. In some areas the rabbits cause damage to crops and forests. They are source of quality lean meat and fur and the hares are largely hunted.