The Isle of Man became separated from Ireland and the British Isles about 8500 years ago. The short period of time between the melting of glaciers and the rise of sea level allowed a small number of species to colonize the island by land. The island was heavily deforested in the Middle Ages, which weakened its environment. Some land is now protected by the government to help preserve its wildlife. Curraghs Wildlife Park, in the wetlands, is home to many species of animals and plants. Many bird species live on the island.