I took this photo earlier today at lake Fairfax in Northern Virginia, USA. I saw a male hooded merganser hanging out with some mallards in a different part of the lake--he's been hanging out with them for the past week or so--so my guess is that the bird on the left is a female hooded merganser. What's the bird with her on the right? is it an immature hooded merganser? (I got a great photo of the male, by the way. I'll go ahead and add it to this post.)