Is it possible to ID this bird from a single photo? I took this photo around sunset, so the yellow might be slightly exaggerated due to the lighting (although I lightened it a little in PhotoShop). The bird was in a group of trees bordering a salt flat. I'm not familiar with west coast birds, so I'm just guessing, but could it be a Cassin's kingbird or a dusky flycatcher? Thanks for your suggestions.