Knutson, M. G., Butcher, G., Fitzgerald, J., and Shieldcastle, J., 2001, Partners in flight bird conservation plan for the Upper Great Lakes Plain (Physiographic Area 16): USGS Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin in cooperation with Partners in Flight. Online at http://www.blm.gov/wildlife/pifplans.htm. (Accessed September 2005) Abstract Keywords