Fourteen distinct terrestrial plant communities occur on the island, which is mostly clothed in various forms of eucalypt forest. Natural and historical clearings provide grazing for many animals, such as bare-nosed wombats ("Vombatus ursinus") which occur in high quantities on the island and Tasmanian pademelons. Nearly all the island's animals are native to Tasmania although some, including eastern grey kangaroos, red-necked wallabies, and Cape Barren geese, were introduced during the late 1960s and early 1970s. Fallow deer were also introduced to the island and were present primarily in the French's Farm area, but sometimes wandered as far north as the small marsh behind Hopground Beach, just north of Rutherford Beach. Sheep were present until around 1981, escapes from prior sheep farming operations. Other animals include common brushtail, ringtail possums, short-beaked echidnas and three species of snake.