at first thought this was a sparrow in my stream but looking closer it was larger and had more markings especially underneath.Only bird I could see that looked similar was a corn bunting.Anyone put me right on this?

at least I have my stream to attract the birds still.Not a very good photos as once again its through the window but going by the bird book I have this looked to be a willow warbler.I patiently await those in the know!!!!!