unfortunately, the branch blocks\most of the wing bars... nonetheless, the shot shows a good look at the undertail. If im remembering correctly (and someone with more experience with Greater Pewee can correct me) but Greater Pewee has a notched tail, something that this bird certainly doesnt appear to have. but you saw the bird in the field, and we didnt, so you would get an idea of the size. Personally, im getting a Western Wood-Pewee vibe from this bird. But like i said, you saw the bird, and got a grasp of its size. -Sam