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<br />- <br /> <br />Channelization of the Missouri River below Sioux City eliminated <br /> <br />use of all riverine sandbar ha~itat and resulted in loss of nest <br /> <br />sites in pottawattamie and Harrison counties, the only known <br />:.,':':L <br /> <br />nesting habitat in the state (ainsmore et al. 1984). <br /> <br /> <br />Great Lakes: Over the past 50 years, viable breeding of <br /> <br />Piping Plovers on the Great Lakes has diminished from eight <br />states (Minnesota, Wisconsin, Illinois, Indiana, MiChigan, OhiQ, <br />Pennsylvania, and New York) to only one state: Michiqan. In <br />Minnesota, Piping Plovers have consistently nested in only two <br />counties: Lake of the Woods (Green and Janssen 1975, Wiens and t <br />Cuthbert 1984, Davis 1985, Wiens, 1986) and St. Louis (Lakela <br />1940, Niemi and Davis 1979). Records from Wisconsin do not <br />indicate that Piping Plovers occurred in large numbers anywhere <br />in the state. Nesting occurred on the south shore of L.ake <br />Superior (Douglas and Ashland co~nties), sporadically on Lake <br />Michigan (Door, Kenosha, Oconto, Ozaukee, and Sheboygan <br />counties), and on Lake Koshkonong (Jefferson County) (Matteson <br />1987; unpub. Milwaukee Public Museum records). Further south in <br />Illinois, Piping Plovers bred in two counties (Lake and Cook) <br />adjacent to Lake Michigan (Nelson\1876, Russell 1973, Russell <br />1983). Simi.larly, Piping Plovers in Indiana nested along Lake <br />Michigan in Porter, Lake, and LaPorte counties {Russell 1973, <br /> <br />1983) . <br /> <br /> <br />10 <br /> <br />~ <br /> <br />