Smart is the word for this crow who is working hard to crack a nut.   I took a video of him landing on the wires and dropping the nut.  He actually got it to crack open.  Towards the end you can hear a loud bong sound.  That is his using a Jeep’s hood to achieve more impact on that nut.   He got all shy on me then and stopped coming down.   Here is a still photo of his hard work which I am sure he came and retrived once I left.