Uihlein Waterfowl Production Area, in Winnebago County, Wisconsin, is the largest of 57 WPAs managed by Leopold Wetland Management District.

The WPA is 2,171 acres. It’s known for duck hunting and is adjacent to Rush Lake. Rush Lake is one of the largest prairie pothole lakes in Wisconsin. These lakes and marshes are formed as a result of receding glaciers and now store flood water and spring ice melt.

Uihlein WPA is known for yellow-headed blackbirds, black terns and many secretive marsh birds. Six impoundments allow water level control that creates different types of habitat favorable to diverse plants, waterfowl, songbirds, and other wildlife and vegetation.