A few days ago, I posted a series of images of two R-w Blackbirds having a turf war (see https://pbase.com/image/171555576 ).

I'm posting the above image to illustrate the sharp lethal beak that these guys have. Those beaks can do some serious damage as these birds are very aggressive in defending their territories. I was surprised that one of the combatants didn't end up with a missing eye. I've seen and photographed these guys chasing away large predatory birds from their territory.