Posted by Denis Kania on January 01, 1970 at 00:00:00
Cape May would have finer streaking that is more uniform in density across the breast than found on Yellow-rumped. This bird's streaking is concentrated towards the flanks and the streaks are more defused or blurry. If you look at the edges of the flight feathers you can see that they are whitish rather than yellow/olive which you would find on Cape May. These features point towards Yellow-rumped Warbler.