Gadwall
Anas strepera

A close relative of the Mallard, Gadwall can be seen fairly often on larger bodies of water, such as these on Lake Neuchâtel. The first picture is of two males (left and right) and a female (centre) and the second is a male.
 

1: Neuchâtel, 11/02/2009.
2: Lac de Neuchâtel, Zihlkanal, 20/01/2008.