Migratory Birds of the Great Lakes University of Wisconsin Sea Grant Institute
 about habitat birds + science 20 birds
aerialist raptors
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Least Bittern Conservation Status

Given its secretive ways, the Least Bittern is especially difficult to detect and census, and as a result population trends are not well known. However, because of its habitat needs, the loss of wetland habitat and the encroachment of exotic species of marsh vegetation likely pose threats.