Yellow-rumped Warblers are so common here in the winter time, and I thought it would be a fun project to keep an eye out for them and photograph their various looks throughout the winter months. These warblers have a bright yellow rump, but the yellow is not always visible; for me it's easier to notice patches of yellow on the sides of the bird's chest. On the above photo, the yellow rump is barely visible, but the yellow on the sides confirms the identification.
Photographically, I love this scene, not only because the warbler was out far enough on the branch to give me a nice clean background, but also because yellowish-greenish patches of color in the frame. I thought that might help the background complement the warbler. Thankfully, the bird was nearly at eye level, so I didn't have to crouch down too much. In hind sight, I might have lowered the camera a little more here, if that wouldn't clutter up the background. I over-exposed the shot slightly to retain detail in the warbler's wings--I believe by about +1/3 stop. I shot it at f/5.6 (wide open on my 400mm lens) to make the background as blurry as possible.