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Wildlife mystery: Why are gray whales swimming into San Francisco Bay in increasing numbers?

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Wildlife mystery: Why are gray whales swimming into San Francisco Bay in increasing numbers?


Credit: Unsplash/CC0 Public Domain

Gray whales have been veering off their normal routes along the West Coast and swimming under the Golden Gate Bridge into San Francisco Bay in unprecedented numbers.

Using thousands of photographs of distinctive markings on the whales’ backs to identify them, marine scientists have confirmed that at least 71 different gray whales—and possibly 84 or more—swam into the bay between 2018 and 2023, with some staying for more than two months, raising their risk of being hit by cargo ships, oil tankers or other large vessels.

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From 2010 to 2017, only about one or two of the giant marine mammals came into the bay every year. Last year, however, there were at least 16, and in 2019 there were at least 21.

“We think it has a lot to do with the fact that the whales haven’t been getting enough food,” said Bill Keener, a biologist with The Marine Mammal Center, a non-profit group in Sausalito. “They may be weak and resting for a while, or they looking for an alternative food source.”

Some are malnourished, he said.

From 2019 to 2023, 22 gray whales were found dead in or near San Francisco Bay, according to data from The Marine Mammal Center, the California Academy of Sciences and public agencies. Of those, 14 died from unknown causes. Researchers performed studies, called necropsies, on nine of the whales. Six died from malnourishment. Three died from a collision with a ship.

Over the past four years, dead gray whales have been found inside San Francisco Bay off Angel Island, and near Richmond, Rodeo, Hercules, San Leandro, Mountain View, the Port of Oakland, Tiburon, the Berkeley Marina and Martinez.

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“They aren’t just near the Golden Gate,” said Keener, who said a slower speed limit for big ships in the bay may be needed. “They are way into the bay, past Angel Island, down to Treasure Island. There’s a lot of ship traffic there.”

Wayward whales have inspired public interest for years.

One lost humpback, nicknamed Humphrey, gained national attention in 1985 and became the subject of children’s books, songs and a movie—drawing crowds of onlookers with binoculars—when he swam into the bay. Humphrey meandered up the Delta to sloughs 25 miles south of Sacramento, staying 26 days before finally returning to the Pacific Ocean as researchers played whale songs from speakers off boats to lure him west.

In 2007, a mother humpback and her calf, nicknamed “Delta and Dawn,” swam into the bay and ventured as far up the Delta as Rio Vista before scientists in boats coaxed them back into the open ocean 10 days later.

There was also a jump in the number of humpback whales that swam under the Golden Gate Bridge pursuing anchovies in from 2016 to 2018. They stayed only a few days each.

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But the latest trend with gray whales seems different, researchers say. It could be a sign of stress in the wider population.

The pattern comes amid a big drop in the gray whale numbers off the Pacific Coast in recent years.

Once hunted by whaling ships in the 1800s for their oil until there were only about 1,000 or 2,000 individuals left, gray whales were protected in 1972 when President Nixon signed the Marine Mammal Protection Act. The last whaling company in the United States, the Del Monte Fishing Company, operated at Point Molate in Richmond. It made Kal-Kan dog food out of whales that its crews shot with mechanized harpoon cannons. The company closed in December 1971 as the law was about to take effect.

After whaling was banned in the U.S., numbers of gray whales increased. By 1994, after they reached a healthy population, the Clinton administration removed them from the Endangered Species Act list in what is still considered one of the nation’s major wildlife success stories.

Their population jumped to 27,000 by 2016, according to estimates from NOAA, the National Oceanic and Atmospheric Administration. But then it fell by at least one third by 2022. Hundreds of malnourished whales began to wash up on beaches in Alaska, Washington, Oregon, California and Mexico. Nobody knew why.

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Researchers said the die-off from 2018 to 2023, which NOAA called an “unusual mortality event,” was likely due to a shortage of food in the Arctic linked to changes in the amount of sea ice, wind patterns and other factors. Whales eat 3,000 pounds or more of food a day, preferring small, shrimp-like crustaceans known as amphipods, along with worms and other tiny creatures that they scoop from the sea floor.

Last year, gray whale numbers began to rebound to as many as 21,000. NOAA declared an end to the “unusual mortality event” in November. Scientists are watching carefully to see if the change is temporary or permanent.

The roller coaster population—and weird detours into San Francisco Bay—could be related to climate change, or it could be part of the gray whale’s natural population fluctuations, said John Calambokidis, a research biologist with Cascadia Research, in Olympia, Washington.

“What is a natural cycle?” he said. “Is this normal? Or something unusual? The ecosystem in the Arctic has changed very rapidly. That’s one reason this has scientists’ attention.”

One thing is clear: The gray whales coming into San Francisco Bay are heading north as part of their annual migration from Baja, Mexico where they mate and breed, and turning right under the Golden Gate Bridge instead of continuing north to Alaska where they stock up on food during the summer months.

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A lot is known about the latest trend because one researcher, Josephine Slaathaug, of the Marine Mammal Center, painstakingly sorted through more than 11,000 photographs of gray whales in San Francisco Bay last year. She built a database, identifying individual whales from photos taken on whale watching boats, the shoreline, and the center’s boats. She showed the animals are most common in March and April, and stayed in the bay between 13 and 75 days.

Slaathaug, a masters student at Sonoma State University, won a prestigious fellowship in April from the National Science Foundation as she expands the study in the coming years. One key question: Will the number of gray whales in the bay go down if their food in the Arctic recovers, and the West Coast population increases?

“We don’t understand all the drivers,” she said. “We have preliminary data. But we do know that with all the ships, the bay is not a very safe place for the whales.”

2024 MediaNews Group, Inc. Distributed by Tribune Content Agency, LLC.

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San Francisco, CA

Latest California-based gig work app lets people book content creators, editors

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Latest California-based gig work app lets people book content creators, editors


It’s 10 a.m. sharp, and Abby Kurtz gets her first assignment of the day. She’s received a time, a location in San Francisco and a target.

Her weapon of choice: an iPhone.

“Being a social agent is really the coolest thing ever,” she said. 

Kurtz is a content creator working through an app called Social Agent, part of an expanding gig economy where more and more workers are trading stability for flexibility. Work that once required connections, planning, and a big budget can now be booked with a tap —extending the on-demand model from rides and meals to storytelling itself.

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 Just make a request, and someone like Kurtz can arrive within 30 minutes, camera-ready.

“What I look for when I’m shooting events is very crisp and clean content,” she said. 

Her mission this time took her to Sutro Nursery, a nonprofit dedicated to growing native plants and that is hoping to grow its volunteer base, too. Board member Maryann Rainey said booking a Social Agent is a lot cheaper than hiring someone to do their social media full-time. 

“I know I can’t do it myself, and I was certainly hoping that these young people would know how to do a good film,” Rainey said.

A typical job runs about $200, with same-day delivery. Agents earn around $50 an hour, plus tips. And if clients already have footage, they can upload it and have it turned into a finished piece. 

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The service is currently available in New York, Los Angeles, and Miami, with a slower rollout now underway in other cities.

 Lisa Jammal, the company’s CEO, said the idea is simple: Let someone else do the shooting.

“We all are missing those beautiful moments because we’re always behind the phone,” she said. 

As for Kurtz, after the shoot, she headed straight to a nearby coffee shop, where the clock started ticking. She had just over an hour to shape her raw material into a polished final cut.

“I think I’m going to give this reel a really peaceful, calming feel, but also informative and inviting,” she said. 

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San Francisco, CA

SF scientists build robotic storm samplers to track pollutants before they reach the Bay

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SF scientists build robotic storm samplers to track pollutants before they reach the Bay


SAN FRANCISCO (KGO) — Environmental Scientist Kayli Paterson from the San Francisco Estuary Institute is hitting the road with colleague David Peterson and a trunk full of water sampling robots.

“Yeah, I think the max we’ve ever done was five. But the sites are very close together. Oh, there it is. Hopefully it samples well,” says Paterson as she turns the mobile sampling lab onto a private oak-lined road.

They’re closing in on a watershed creek flowing through the hillsides near the San Andreas Lake reservoir, west of Highway 280 in Millbrae, part of the larger watershed that eventually drains into San Francisco Bay.

“So, we’ve got our sampler. Look at the battery. Hook that up, red and black. This is a 12-volt lithium battery, and it powers our sampler for probably about six to seven days,” she explains, showing off a self-contained unit miniaturized into a portable case.

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MORE: Futuristic Fight Club: VR-controlled boxing humanoid robots battle in San Francisco

The black cases are their latest innovation in stormwater science. Robotic samplers anchor in key sections of the watershed to monitor not only flow, but also the chemicals and pollutants washing downstream toward the Bay.

“And this is a front-line pollution sampler. It’s getting the stormwater before it enters the Bay. And so, we want to know what’s coming into the Bay and getting these samplers out there in more locations will give us a better idea of where we might have issues, where a hotspot is, or maybe a previously unknown contaminant,” says Paterson.

“It’s important to get out that fast,” her colleague David Peterson adds. “You know, in these storms as they’re happening, because the water is picking up pollutants in real time, and we need to be there to capture them.”

When we first met Peterson several years ago, he and another Estuary Institute team were sampling water along the Bay shoreline by hand, a technique that’s still valuable. But to cover more ground, Kayli and a group of collaborators began developing the robotic samplers over recent storm seasons.

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Kayli and David start by chaining the unit itself to a tree near the creek bank. The system employs remote-controlled pumps that draw samples from the creek and store them in onboard containers. The software controlling the volume and frequency can be operated from a phone app.

MORE: New study of San Francisco Bay fish confirms concentrations of PFAS aka ‘forever chemicals’

One of the key targets in this study is a group of so-called “forever chemicals” known as PFAS, synthetic compounds that persist in the environment and have been detected in widespread areas of the Bay.

“And we capture samples and send them off to analytics labs across the country. Typically, universities or private labs will process these for us,” Peterson explains.

For these two stormwater detectives, it’s a mission that requires a combination of speed and patience**, chasing flowing water** through creeks and storm drains, sampling as they go.

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“So, we’re looking for areas – the point of this is to do source control. Ultimately, we want to be able to trace this back to a possible source,” says Kayli Paterson.

And potentially prevent a source of toxic pollution from reaching San Francisco Bay and our Bay Area ecosystem.

More than a dozen of the robots were given names in a special contest, including the Big Sipper and the Tubeinator.

Copyright © 2026 KGO-TV. All Rights Reserved.



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San Francisco, CA

Floats for San Francisco Chinese New Year Parade get finishing touches

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Floats for San Francisco Chinese New Year Parade get finishing touches


SAN FRANCISCO (KGO) — ABC7 Eyewitness News got a sneak peak as crews put the finishing touches on the floats you’ll see at Saturday’s San Francisco Chinese New Year Festival and Parade.

Since it’s the year of the fire horse, you’ll see a lot of horses and fire symbolism on the floats, housed at Pier 19.

“So Year of the Horse, it’s energy, it’s passion, it’s momentum so a lot of things that we’re really hoping to embody in the new year,” said Stephanie Mufson, owner of San Francisco-based The Parade Guys, which designs and constructs the floats.

She said they’ve been building them for about three months, with the designs starting in November.

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MORE: Bay Area artist brings Year of the Horse statue to life for Golden State Warriors

“We’re in the home stretch,” she said. “We’ve got a couple of days left and we’ve got a nice little team that’s cranking out all the finishing work that needs to go into it.”

Derrick Shavers was sanding some wood that will be painted and become cherry blossom trees on a float.

“It’s exciting,” Shavers said. “I look forward to coming every year and just creating and making things shine and sparkle.”

Bon was painting mountains for a float, making sure everything is perfect in time for the parade.

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MORE: Meet the 2026 San Francisco Chinese New Year Parade mascot, Maverick

“It’s one of the few parades that actually happens at night still,” Bon said. “So we got to make sure all the lighting is in check, and people are safe on the float. It’s all in the details, just for it to walk by you for 10 seconds.”

Ten seconds that bring so much joy to those watching the parade.

Here’s how you can watch the parade on ABC7 Eyewitness News on Saturday, March 7.

Coverage starts at 5 p.m. wherever you stream ABC7.

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SF Chinese New Year Parade 2026: How to watch ABC7 Eyewitness News live coverage


If you’re on the ABC7 News app, click here to watch live

Copyright © 2026 KGO-TV. All Rights Reserved.



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