Sorry I don't have a better photo. I took this one from pretty far away. It was high in a cottonwood tree at Sweetwater Wetlands in Tucson, Arizona, USA. The photo should be geotagged. I took this photo this morning (Dec. 9, 2011). It looks like some sort of flycatcher (ash-throated?), or maybe a vireo but not one that I recognize (though I'm a beginner). Vermilion flycatchers and black phoebes are quite common at Sweetwater these days. There are also tons of warblers migrating through the area now, most commonly yellow-rumped and orange-crowned. Sorry if this is a no-brainer. As I said, I'm a beginner. Thanks.