This Red-breasted Merganser was another lifer for me. This would have also been one I could have easily mis-identified as a Common Merganser if it weren’t for the information shared by other bloggers. In doing a bit of research on the All About Birds website they say one of the main differences between the female of the species is that the Common Mergansers will have a more defined white chin. Now the only thing I’m not sure is if these are females or immature males…
The lores are whiter in immature red-breasted mergansers, at least in Sybley’s. The birds are not as mottled as teenagers can be. So I think they are females.
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