Okay, this really isn't fair because so few field marks are visible, but give it a try before reading below the photo.
So, I am guessing that figuring out that it is a flycatcher isn't too hard. But did you correctly guess willow flycatcher? Well, even the field guide suggests that you can not tell a willow from an alder flycatcher without habitat or a call, but did you see that it is sitting in a cherry tree, not a wetland species? The call is a distinctive fitz-bew, which was heard but not exactly available here.
Keith Christenson - Wildlife Biologist