Migratory Birds of the Great Lakes University of Wisconsin Sea Grant Institute
 about habitat birds + science 20 birds
aerialist raptors
copyright UW Sea Grant, writer: L. Wiland, design: T. Yao contact us credits

Trumpeter Swan Conservation Status, page 3

Decreasing wetland habitat quantity and quality also can affect the long- term growth and stability of Trumpeter Swan populations. Wetland loss through drainage and filling, or invasions by aggressive Mute Swans, carp or purple loosestrife could limit the amount and quality of habitat available to nesting Trumpeters.