Wisconsin Islands Wilderness

The Wisconsin Islands Wilderness is a 29-acre (12 ha)[1] wilderness area located in Door County in northeastern Wisconsin. It is one of the smallest wilderness areas in the United States. Managed by the U.S. Fish & Wildlife Service, the wilderness area is composed of three islands in Lake Michigan.

Wisconsin Islands Wilderness
IUCN category Ib (wilderness area)
LocationDoor County, Wisconsin, USA
Nearest cityLiberty Grove, Wisconsin
Coordinates45°12′32″N 86°58′38″W
Area29 acres (12 ha)
Established1970 (1970)
Governing bodyUnited States Fish & Wildlife Service

History

The islands comprising the Wisconsin Islands Wilderness were initially declared a national preserve and breeding ground for migratory birds around 1913, and designated as wildlife refuges shortly thereafter. Plum Island and Pilot Island both have lighthouse facilities (the Plum Island Range Lights and the Pilot Island Light, both on the U.S. National Register of Historic Places), and have had minor U.S. Coast Guard presence, even as late as 2007.[2] However, Spider, Hog, and Gravel Islands have always remained uninhabited. In 1970, these three islands were designated a wilderness area under the Wilderness Act.

Description

The Wisconsin Islands Wilderness is managed by the U.S. Fish & Wildlife Service and is composed of three islands in Lake Michigan:

The three islands are largely limestone and dolomite outcroppings of the Niagara Escarpment, exhibit geology typical of changing water levels and glaciation, and rise only a few feet above the surface of Lake Michigan. Canadian yew, red raspberry, and red-berried elder grow on Hog Island, while only the remnants of a mixed birch, cedar, and tamarack forest remains on Spider Island, after having succumbed to thousands of nesting birds. There is no known vegetation on Gravel Island.

The nesting grounds of the islands support many types of colonial birds, including shorebirds, seabirds, and ducks. Spider and Gravel Islands are one of the westernmost breeding grounds of the great black-backed gull. All three islands have significant colonies of herring gulls and double-crested cormorants. Caspian terns can be found on Gravel Island. Spider Island also supports a number of waterfowl species, including the American black duck, Canada geese, and the mallard. Red-breasted mergansers and great blue herons can be found on Hog Island.

No public access is allowed, due to the fragile nature of the bird habitats. Boaters are required to stay one-quarter mile (0.40 km) from shore, both to limit accidents on the rocky shoals surrounding the islands and to protect the nesting bird species.

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See also
  • List of U.S. Wilderness Areas

References
  1. - Wilderness.net. Retrieved 8 Aug 2013
  2. - FWS.gov. Retrieved 8 Aug 2013
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