In a QUEST radio story on Monday, I cover the Bay Area’s California gull population becoming a major concern for the South Bay Salt Pond Restoration Project. Thousands of acres of industrial salt ponds are being restored for shorebirds and other wildlife. And that restoration work is creating a big opportunity for some very aggressive gulls.

While reporting the story, I stumbled upon a mystery that’s well-known to San Francisco Giants fans: Some gulls have an uncanny way of showing up at AT&T Park during the eighth or ninth inning of a ballgame.

Photo: Malingering/Flickr

Day game or night game, the gulls bizarrely seem to know when the game is close to ending, pouncing on leftover hot dogs and garlic fries. As Giants broadcaster Mike Krukow said, “if you were a gull, where would you be?”


There are a lot of popular theories about how the gulls time their arrival so well. Do they recognize the illustrious beard of Giants closer Brian Wilson? Do they know “Take Me Out to the Ballgame,” a tune that’s always sung during the seventh inning stretch?

I spoke to a few local experts to get their take…

Dan Murphy, Volunteer with Golden Gate Audubon

It’s a crime of opportunity. They’re very well attuned to our behavior and our trash. When there are large numbers of people in the stands, gulls don’t come into the ballpark. But they can sense when things are starting to wind down. A lot of people leave the game before it’s over, so they might be clued in by people moving out of the upper deck toward the eighth inning. That makes sense since they seem to settle on the left field side first.

If a game goes into extra innings, the gulls still seem to know when the ninth inning is. You’ll see them sitting on the roof or on the big glove in the outfield, waiting for the game to end. That may still be due to the fans that leave early, but they seem to have a sense of how long games normally go. It’s likely that a few birds are always watching and as soon as a few birds go in, others will follow. They’re really good at what they do. They find food sources and use them to the max.

David Shuford, Biologist with PRBO Conservation Science:

Gulls spend their day cruising around a lot. But once they figure something out, they tend to come back. So even though the ninth inning doesn’t happen at the same time each day, once a few gulls pick up on it, you’ll soon have a crowd. It’s possible that they can recognize the sounds, too, like songs that are played during the game. Gulls are pretty good about sound.

In general, they’re really good at figuring things out. Like when local dumps are closed on the weekends, the gulls seem to know that and don’t show up on those days. It’s hard to know if they truly know what Saturday is. They may just be cruising by and not see any action, so they don’t land. But they seem to recognize the pattern.

Gulls have an advantage – they’re total generalists. They’re smart and they’re tough. They can eat just about anything too. They go after fish, garbage, and other birds. Some of our work on the Farallon Islands has shown that gulls can actually recognize certain individual people as well.

Josh Ackerman, Research Wildlife Biologist with USGS:

They do exactly that same thing at the landfills in the Bay Area. We’ve done studies on gulls where we’ve tagged them with transmitters and tracked them daily for two years. California gulls depend on a few of the landfills in the South Bay for food. They arrive exactly when the dumps open and leave right when they close, since the trash piles are covered up when the landfill isn’t operating. From our studies, we know that the gulls cover a lot of territory during the day, so it’s not a big deal for them to travel to find food.

George Costa, Senior Vice President of Ballpark Operations at AT&T Park:

We’ve seen an uptick. There seem to be more gulls lately. They always time their arrival to an inning or two innings before the game ends. They’re creatures of habit. They know where the food is and that crowds mean food. They’re never here except for game days, but if there’s a game, they crash the party every night.

It’s a series of triggers that tells them it’s time. They see the lights and the crowds. There are food smells, like the garlic fries. It’s a combination of all those things. You’ll see the gulls line up on the left field roof before the game ends. We see the scouts come in and they cue the rest of the gulls.

It’s a nuisance really and the fans don’t enjoy it. So we’re looking at a variety of possibilities to deal with it, including having a falcon on site. They’ve used them at other ballparks and they seem to work there. You won’t get rid of the gulls completely, but we think it would get rid of about 80 percent. We have to retrain these gulls.

Got a theory of your own?


Why Do Gulls Always Appear During the 8th or 9th Inning of Giants Games, Regardless of Time? 15 July,2011Lauren Sommer

  • Ed Whisler

    At Oakland ball park, the gulls start showing up around the 7th inning. first they start landing on the edge of the upper deck, then start working their way down as the crowd leaves.

  • Obviously, it is right after the 7th inning stretch, when most of the crowd has gotten some snack, and then thrown away what they couldn’t eat – or spilled it.

    They also play Take Me Out to the Ballgame and so clue gulls in for some distance away that the 7th inning stretch is underway.

  • Jeff

    I love the idea of a staff-falcon. Can he PLEASE wear a little teeny team ball cap? That would make it even better.

  • Maria

    I wonder if a staff-falcon can grow a beard.

  • This was actually talked about on another website, here:


    It seems that our favorite baseball song that asks us to take us out there acts as a Pavlovian trigger for the seagulls.

    Of course, there’s another theory:

  • Frank

    They know it’s almost over when people start to leave. I am very confident that’s what it is. And there are always a certain amount of people who leave in the 7th and 8th.

  • Frank

    Why do the NEVER land on the field? I have always wondered that.

  • Jim

    How many days living on fries and dogs does it take to make a gull too overweight to fly? Are they heavier at the end of the season?

  • Brenda

    They showed up toward the end of the soccer match on Saturday, too. So it’s not “Take Me Out to the Ballgame” that attracts them. Not sure if people were leaving early since the stands weren’t full to begin with.

    A few “scouts” appeared first, from the left field side. They flew over the field as the match was still being played. Within 10-15 minutes of the match ending, gulls were everywhere. Rather Hitchcockian…

  • hapa

    maybe it’s that crowds kinda look like tides

  • victor

    I think the staff falcon should wear a panda cap

    • mic

      good idea since the it can’t grow a beard.

  • mic

    correction: good idea since the falcon can’t grow a beard.


Lauren Sommer

Lauren is a radio reporter covering environment, water, and energy for KQED Science. As part of her day job, she has scaled Sierra Nevada peaks, run from charging elephant seals, and desperately tried to get her sea legs – all in pursuit of good radio. Her work has appeared on Marketplace, Living on Earth, Science Friday and NPR’s Morning Edition and All Things Considered. You can find her on Twitter at @lesommer.

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