American Herring Gull, (Larus smithsonianus)
Brooklyn, NY, Spring, 2013
2 couples were screaming at each other then a fight errupted. About Herring Gulls: "Outside of the male/female and parent/chick relationship, each gull attempts to maintain a respectful 'safe distance' from others of its kind. Any breach of this results in fighting, though severe injuries are seldom inflicted."