We have a very protective mommy bird in our yard. Or maybe it's the daddy bird. Whatever it is, it is very protective of it's nest that is in the tree by the kids' swing set. I saw it chase off and fight 3 or 4 birds in a matter of 10-15 minutes. One of those birds being a huge crow. Thankfully it doesn't see any of us as a danger. It will just sit on the limb and watch the kids play.
This following video is Zoey talking about what happened when we were outside playing today. Enjoy!