1. Agresti A (1996) An introduction to categorical data analysis. Wiley, New York
2. Anteau MJ, Afton AD (2009) Wetland use and feeding by lesser scaup during spring migration across the upper Midwest, USA. Wetlands 29:704–712
3. Backwell PRY, O’Hara PD, Christy JH (1998) Prey availability and selective foraging in shorebirds. Animal Behaviour 55:1659–1667
4. Catlin DH (2009) Population dynamics of piping plovers (Charadrius melodus) on the Missouri River. Ph.D. Dissertation. Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
5. Cuthbert FJ, Scholtens B, Wemmer LC, McLain R (1999) Gizzard contents of piping plover chicks in Northern Michigan. Wilson Bulletin 111:121–123