VIDEO: Common Grackles Migrating Through in Large Groups - 11/6/14
They had roosted in our trees overnight and were ready to eat breakfast and move on I suppose. They are in our oak trees and prefer the tops of trees. Grackles have a hard keel on the inside of the upper mandible that they use for sawing open acorns. Typically they score the outside of the narrow end, then bite the acorn open.