If you'd said raccoon I'd be thinking you might be right. We have a raccoon family in the neighborhood who are a real pain. Crows I seldom see in the yard, especially since we lost so many trees to ash borers and storms/tornado. I'll be going out to mount a full scale search in the shed shortly.If they haven't turned up yet, I got a brief vision of a crow making off with it after falling near the shed. From the crow's point of view which wasn't expected.
Hope I'm wrong, Duke.