What's flying near you?

I often see birds, drinking from the guttering on the kitchen extension. From my bedroom I have "Birds eye view" of them. This morning, I watched a magpie pulling out leaves followed by something white - which he ate. Eventually, I realised that it was a piece of bread. He kept pulling more and more bits of bread out which he also ate. I'm guessing that it came from the bird feeder. I wonder which bird put the bread in the guttering? This magpie didn't bring it. Maybe he put it there previously and left it to soak to soften it?