Pelee Island is one of Ontario's most botanically significant sites, and features several Nature Conservancy of Canada areas, and two Provincial Nature Reserves, Lighthouse Point Nature Reserve and Fish Point Nature Reserve. Glaciation left a variety of habitats for wildlife, such as wetlands, sand dunes, alvars (areas of limestone with a shallow overburden), and deep soils suitable to the trees of the Eastern Deciduous Forest zone. Pelee Island is home to numerous species at risk including both flora and fauna as well as insects, snails, mammals, birds, reptiles, and amphibians.