American white pelican first arrival dates, nest initiation dates, and the numbers of nests and chicks for individual subcolonies at Chase Lake, North Dakota, 2004–2008.

1 Nest numbers in 2004 are estimates based on incomplete data; adult pelicans abandoned the nests prior to the scheduled survey. 2 The surveys of chicks were conducted on the following dates: 15 August 2005, 14 July 2006, 28 June 2007, 12 August 2008. No pelican chicks survived in 2004.