American Black Duck

In a mixed group with mostly Mallards, a couple of American Black Ducks.  My first, so pretty exciting birding on a cold winter day.  (There's a little lake in town that has several outlet thingies that keep the water moving, and therefore open.  Ducks gather there, fairly close to shore, and pretty easy to spot.  That and a far better birder than I told me there were Black Ducks in one of the three places.  And there were!)