The seagull habitués of the China Basin corner of San Francisco Bay, where the Giants play, know how to read the scoreboard. When the game gets into the late innings, a few appear, circling McCovey Cove and the right-field bleachers. If a game goes long, they begin to show their annoyance by trespassing into the airspace over the playing field. Fans have been trained to clap and make noise, scaring them away. But only for a few minutes. Extra-inning games are especially infuriating and the birds show their displeasure at being delayed from scavenging leftover ballpark food by flying closer to the field and in greater numbers. When the game finally ends and the crowd finally disperses, the seagulls invade the stands and devour what they consider to be their entitlement.