I hope that people here will enjoy this amazing video (https://www.youtube.com/watch?v=cbSu2PXOTOc https://www.youtube.com/watch?v=cbSu2PXOTOc) as much as I did

I hope that people here will enjoy this amazing video (https://www.youtube.com/watch?v=cbSu2PXOTOc https://www.youtube.com/watch?v=cbSu2PXOTOc) as much as I did. I knew that crows are smart, but this is clearly the next level of intelligence ... By the way, I have discovered this video via the relevant cool project's website: http://www.crowdedcities.com http://www.crowdedcities.com.