Chaffinch chick

Sitting in its favourite position just outside our slightly open bedroom window. A couple of times it has come in the early morning and got stuck between the window and curtains. Today I took a shot through the gap in the window - it flew off when I got a bit too close but was was back again just a few minutes later. It's got a sunflower seed in its beak but doesn't seem to know what to do with it.