Fourmile Island Rookery State Natural Area
Natural Features
/5
Town of Williamstown, WI
Latitude: 43.4929 (43°29′34″N)
Longitude: -88.6243 (88°37′27″W)
Longitude: -88.6243 (88°37′27″W)
Description
Situated with Horicon Marsh, Fourmile Island contains one of the largest heron and egret rookeries in the Midwest. The narrow island is forested with large oaks, basswood, elm, aspen, and cottonwood--trees used for nests by great blue herons, black-crowne
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