The males ducks in this photo that I took yesterday at Lake Fairfax, in Northern Virginia, are clearly wood ducks. But what kind of ducks are the females? They don't look like female wood ducks. (See the 2nd photo of a female wood duck.) To my poorly trained eye, they look like hooded mergansers. Are they? And if so, what are they doing cavorting with male wood ducks. I'm not sure I approve.