1st photo: 2 males and 2 females. Texel, The Netherlands,18 April 2012
2nd photo: A male and a female. Harderwijk, The Netherlands, 23 November 2008
3rd photo: A male in eclipse plumage, Lauwersmeer, The Netherlands, 19 January 2011
4th photo: 3 females, Lauwersmeer, The Netherlands, 19 January 2011