Bird Detective The strange Duck

The strange Duck

Date seen:

09/04/2011

Seen by:

Andrew7

Location:

Cheadle, Staffordshire

I spotted this Duck, & have no idear what it is. It looks much like a Mallard but much bigger, it has duller plumage & a strange gray tufft, On back of its head. could this be somesort of Mallard cross ?

What species is it? Mallard
Red-breasted Merganser
Tufted Duck
White-headed Steamerduck Suggest another species?