Several different species of ducks spend the winter on the estuary out back. The hooded mergansers with their white heads are the most prominent. They are very cautious and tough to photograph. The mallards, which stay all year round, are the most fun to watch especially once the water freezes.
RTY Photography Blog 
Beautiful!
Ray, you’ve managed to capture my favorite winter ducks (although it’s a toss-up between mergansers and buffleheads). Your patience astounds, your ‘eye’ remains remarkable!
Carolyn