I did a google search because I have been witnessing this phenomena in Linden MI for the last month or so. I throw scraps out daily for a family of crows so the same group visits regularly.
There is a small hawk that often joins them in the flying and swooping. Then they hang out in the tree together. I sometimes see them down the road hanging out on the ground together.
I have included the two pics I managed to get.
Maybe you can identify the hawk?
This looks to me like an immature Cooper’s Hawk. It would make sense that it is a juvenile, and that the crow is a juvenile too – it seems it would be more likely that they would play together. If anyone has a better ID, please let us know.