Here you can see the male feeding. American Black Ducks are dabbling ducks- they feed either by skimming the surface of the water, or by dabbling and reaching items in shallow water as shown in my pictures below. The American Black Duck diet includes aquatic insects, crustaceans, and small fish, which this duck may have been after:
In this picture you can see the male preening. You can also see one of the identifying features for black ducks- the blue patch on the wing. The main difference between the male and female American Black Duck is the beak as far as I've been able to tell- the male black duck's bill is more yellowish.
More Provincetown duck pictures to come!
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