Breakfast on the birdbath

Every morning, a crow alights on the edge of my birdbath, not to clean or preen, but to eat his breakfast.

At first I thought he might be attracted to the shiny glass beads in the birdbath. But no, the beads are still there.

The huge black bird stands on the edge of the little bowl, chomping away on his breakfast. Sometimes he drops his food in the water, then fishes it out. Sometimes he finishes it completely, then flies off to a telephone line or the neighbor's tree. And a couple of times, he has discarded what looks like greasy chicken bones in the water.

Which leads me to wonder, just where is this bird getting chicken bones so early in the morning?