Originally Posted by crispycreme
Well, except behavior of Arthur's bird makes one think male, not female, although in both species the basic plumaged male is nearly identical to the female.
This is interesting; I can't find any reference to adult male breeding/non-breeding plumage for the Summer Tanager. Doesn't it have non-breeding plumage? I can find it for the Scarlet in every reference, so if we lean to the side of it being a male, it would most definitely lean to non-breeding male Scarlet. I don't know...it just doesn't fit either. No one said birding was easy right?