Sounds to me like they're quite human. :D In the old days people stayed with their mother and father until they married and had a family of their own. Those who never married stayed home to help the parents. That's what this dynamic reminds me of.
Have yet to see crows in my area, but the Pigeon Swarms as I call them are the most amazing thing to see. I think there's only something like 100-150, but it's better than fireworks. An organic fireworks display that shows the beauty of creation. The sound of multiple birds taking flight is also a marvel for me.