I think we can all agree on one thing - warblers are tricky. Not only are all but the brightly-colored breeding plumage males tricky to identify, the rapid furtive movements of most warbler species make them tricky even to view long enough to get a good look at in the first place.

Male American Redstart Warbler
However by placing a BirdCam 2.0 by her backyard bird bath (few warbler species visit bird feeders), frequent Wingscapes contributor nancybirdies from Vienna, Virginia not only managed to capture this and a few other images of a male American Redstart, she helped to increase the Wingscapes BirdCam Life List by yet another bird.
Thanks Nancy!
David Sibley has a recent post on his blog discussing the strange image of a Carolina Chickadee taken by the Bird Couple. He breaks it down simply, clearly, and no doubt correctly. Like his books, Sibley's blog is great to read. Check it out....
Floyd at The Flycatcher blog captured what appears to be an unusual Lessor Goldfinch with his BirdCam...