&sq=Qlik&lang=&file=File:Aerial_view_of_the_Sister_Islands,_Door_County,_Wisconsin_2020_(cropped).png) In June 2020 when this picture was taken the average lake level was 177.45 meters above sea level;[1] the relatively high lake levels reduced the size of the islands that year. | |
&sq=Qlik&lang=&file=File:USA_Wisconsin_location_map.svg)  Sister Islands &sq=Qlik&lang=&file=File:Usa_edcp_location_map.svg) Sister Islands | |
| Geography | |
|---|---|
| Location | Green Bay, Lake Michigan |
| Coordinates | 45°13′28″N 87°08′46″W / 45.2244317°N 87.1462240°W |
| Area | 6 acres (2.4 ha) |
| Highest elevation | 581 ft (177.1 m) |
| Administration | |
| State | Wisconsin |
| County | Door County |
| Town | Liberty Grove |
The Sister Islands are two islands in Lake Michigan. They are located in the bay of Green Bay, in the town of Liberty Grove, Wisconsin.[2] At one point the islands were connected, but higher water levels have eroded the size of the islands. Combined, the area of the islands sits at 6 acres (2.4 ha).
There are many species of birds that nest on the islands. In 1964 there were an estimated 1,350 to 1,650 breeding pairs of herring gulls on the islands.[3] Both islands are owned and operated by the Wisconsin Department of Natural Resources, and they are protected as the Sister Islands State Natural Area.[4]
The shipwreck Meridian lies in the water south of the islands.[5]
- ^ Lake Michigan-Huron: Monthly Lake-Wide Average Water Levels (1918 - Present), Great Lakes Environmental Research Laboratory, National Oceanic and Atmospheric Administration, accessed February 25, 2022
- ^ "Report For Sister Islands". USGNIS. Retrieved 17 April 2018.
- ^ Town of Liberty Grove Comprehensive Plan 2003, Part 2, page 29 (page 3 of the pdf)
- ^ "Sister Islands". Wisconsin DNR. Retrieved 17 April 2018.
- ^ "Final Voyage". Wisconsin's Great Lake Shipwrecks. Archived from the original on 2 December 2010. Retrieved 17 April 2018.
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