Nah, don't you think crows know a little better than to expect food to come out of a flat lid (with no container)? If you saw a monkey doing the same, would you

Nah, don't you think crows know a little better than to expect food to come out of a flat lid (with no container)? If you saw a monkey doing the same, would you think it was looking for food? Why get on the lid and wait, if you're looking for food? Why fly back to the top, if you're looking for food? Why slide down with the lid? etc. I would expect the crow to take other actions, if it were frustrated & looking for food. The crow picks at the lid, possibly to cause a stir to slide further down, but I don't presume that far. There are many reasons for picking at things, if you're a crow.