Gadwall

This photo of a Gadwall (Anas strepera), a medium-sized dabbling duck, was taken at a small wetland in SW Calgary on 20 May 2011.

"A common duck of lakes and ponds, the Gadwall appears drab from a distance. Up close, however, the male shows a remarkable pattern of intricate markings on all of its body feathers." From Cornell Lab of Ornitholgy.

www.allaboutbirds.org/guide/gadwall/id

en.wikipedia.org/wiki/Gadwall