I made it to the point where I could jingle my keys to let them know that I was putting food out and they would come down within a few minutes. They love cat kibble and blueberries, but will not eat apples or walnut pieces.
Besides the baby bird parts, I received:
1. French fries
2. BBQ ribs, just the bone and a little sauce
3. Baked ziti noodles
4. An adult dead bird. It was opened up, and presumably most of the organs were removed.
5. Chunks of bread / bun
6. Chicken nuggets
There's a McDonald's a few miles from my house and I think that they were raiding the dumpster.It was a neat experience, and I still hear them cawing at me from time to time. You'd think that they would all sound the same, but they definitely have distinct "voices" once you get to know them.
Here is my crow friend: https://i.imgur.com/1A37se8.mp4