We have a few
California Scrub Jays nesting in our yard. They are very defensive of their nests. My wife was trimming a large hedge just outside our backdoor and was getting dive bombed - yep a nest with eggs was in it. They are brave to the point of death. I watched one trying to chase off a black crow, once the crow landed the jay flew in next to it and ended up being lunch. Birds are vicious.