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Re:Science Can Neither Explain Nor Deny the Awesomeness of T... by martinkallstrom on Monday January 16, 2012 @05:02AM (#3470100)
All five points would also be true in the case he's trying to find food and being frustrated with not getting any. And missing in your list is "6. The crow is spending most of it's energy picking at the lid." which is not explained by the theory that it is just spending a day in the slopes.
Re:Science Can Neither Explain Nor Deny the Awesomeness of T... by jaekwon on Monday January 16, 2012 @05:24AM (#3470154)
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.