Scarlet Tanager, Charles River Peninsula, Needham, MA
Except for the threatening skies, the stiff breeze, and the myriad landscaping crews, this was the kind of day you dream about. Who cares about crisp photos and pristine recordings when you can stand in one spot and listen to a rose-breasted grosbeak, a scarlet tanager, a Baltimore oriole, and a couple of bobolinks, all singing simultaneously?
Yes, I said bobolinks. From the looks and behaviors, I'm going to say transient. The fellows were getting along much too well, especially with a female in the tree. But dual blasts of bobolink crazy goodness. The guys were also not in tip-top plumage, looking a little starlingy. You might also try the tanager/oriole combo, or the rather unusual tanager/bobolink chorus.
And on the warbler front, if I had gone elsewhere this morning, I would have missed: the triumphant return of the common yellowthroats, a skulking white-eyed vireo (mmm, listy), an American redstart, and this lovely blue-winged warbler. I'm always surprised how far its wheezy song carries.