California
Turkey vultures indicate rodenticide prevalence near Los Angeles, California, despite state-wide bans
Turkey Vultures (Cathartes aura) in southern California are still exposed to anticoagulant rodenticides (ARs) even though legislation was passed to drastically reduce the presence of these poisons across the state.
This is according to the short communication “Turkey Vultures (Cathartes aura) from Southern California are Exposed to Anticoagulant Rodenticides Despite Recent Bans,” recently published in the Journal of Raptor Research.
The harmful nature of these rodenticides is what led to their ban in California. If they persist, this could spell trouble for additional non-target wildlife species, including those with an endangered status like the Burrowing Owl (Athene cunicularia).
Anticoagulant rodenticides cause system failure in animals by interfering with the synthesis of vitamin K-dependent coagulation factors in the liver. This is true for rats as well as raptors. Of the non-target wildlife species that encounter ARs, raptors are disproportionately harmed because toxins accumulate as they move up the food web, reaching their highest levels in top predators.
In southern California there are three especially vulnerable raptor species for which this is of immediate concern: the Burrowing Owl (Athene cunicularia), White-tailed Kite (Elanus leucurus), and the well-known scavenging California Condor (Gymnogyps californianus), the latter of which already faces constant health risk from residual lead shot fragments inside carcasses on the landscape.
Turkey Vultures possess a suite of characteristics that make them uniquely representative of poison accumulation in their environments. They are more widely distributed than many of their raptor cousins, including the California Condor. They also cruise over large swaths of land encompassing many different habitats and consume a wide variety of prey items. These qualities make them important sentinels in the world of raptor toxicology. The field focused on identifying primary toxicants threatening raptor populations.
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Wing-tagged Turkey Vultures are easily identified from a distance. Credit: Miguel D. Saggese
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Burrowing Owl (Athene cunicularia) population are regarded as ecologically extirpated in Southern California. Credit: Pete Bloom
To investigate the prevalence of vulture exposure to eight different types of rodenticides, a team of researchers led by Drs. Peter Bloom, Miguel D. Saggese, and Andrea Bonisoli-Alquati trapped 27 Turkey Vultures in southern California near Anaheim between 2016 and 2021. The birds were fitted with wing-tags and their blood was sampled. All birds were subsequently released back into the wild.
Each was tested for first-generation ARs and second-generation ARs, the latter of which is thought to be more toxic than the former due to its higher strength and slower metabolic breakdown. The results showed that 11% of the vultures tested showed evidence of AR exposure. Although 27 birds is a small sample size, these findings suggest that if vultures are being exposed, other raptors probably are too.
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“The presence of rodenticides in the blood of a few individuals is just the tip of the iceberg and demonstrates that these compounds are still out there. Even a small percentage of exposed wildlife should be considered a loss,” says Saggese, a faculty member at the College of Veterinary Medicine at Western University of Health Sciences.
The researchers recommend future studies focused on comparative analysis of both liver and blood samples from Turkey Vultures because liver, while difficult to collect, provides a more accurate and timely snapshot of AR exposure. Rehabilitation centers care for many birds that eventually succumb to their afflictions, providing a potential source for ground truthing this methodology.
Furthermore, the team emphasizes the importance of continuing to monitor AR exposure in Californian Turkey Vultures and keeping an eye on the adherence of pest control companies to the active legislature regarding rodenticide use.
More information:
Miguel D. Saggese et al, Turkey Vultures (Cathartes aura) from Southern California are Exposed to Anticoagulant Rodenticides Despite Recent Bans, Journal of Raptor Research (2024). DOI: 10.3356/jrr245
Provided by
Raptor Research Foundation
Citation:
Turkey vultures indicate rodenticide prevalence near Los Angeles, California, despite state-wide bans (2024, December 3)
retrieved 3 December 2024
from https://phys.org/news/2024-12-turkey-vultures-rodenticide-prevalence-los.html
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California
Rain continues in parts of California reeling from flooding and high tides – WTOP News
CORTE MADERA, Calif. (AP) — Crews cleared mud from key California highways as forecasters warned Sunday that more thunderstorms were…
CORTE MADERA, Calif. (AP) — Crews cleared mud from key California highways as forecasters warned Sunday that more thunderstorms were on the way after downpours and high tides caused flooding, road closures and rescues of people trapped in cars.
Five northern counties remained under a flood watch, with up to three inches (7.6 cm) of rain possible through Monday night in areas that have been drenched off and on since around Christmas, said the National Weather Service office in Eureka. At least a foot (.3 meters) of snow was likely in the mountains.
To the south near the San Francisco Bay Area, waters were slowly receding after roadways from Sausalito to San Rafael were flooded during heavy rain that coincided with record-breaking “ King Tides.” Such tides occur when the moon is in its closest position to the Earth, creating a stronger gravitational pull.
Some people kayaked along swamped streets, while others waded through water above their knees. Authorities were called to assist when cars got stuck in water as high as 3 and 4 feet (1.1 and 1.2 meters), Marin County Sheriff’s Sgt. Michael Dobbins said Saturday.
“I’ve been around here for the King Tides and I’ve never seen it this high. Never,” Jeremy Hager of San Rafael told KTVU-TV.
Flooding was reported across Marin, Sonoma, Alameda, San Mateo and San Francisco counties.
While the tides were waning, lingering thunderstorms on Sunday could cause additional problems throughout low-lying areas, forecasters said. “For anyone driving, slow down and allow extra time to reach your destination,” the Bay Area office of the weather service warned on social media.
Farther south in Santa Barbara County, a key highway was reopened Sunday after it was blocked for most of the weekend near Goleta due to a series of mudslides. A man died after he was swept into a creek during the storm, the sheriff’s office said Saturday.
Parts of Santa Barbara County received more than four inches (10 cm) of rain over two days, the weather service said Sunday.
After a mostly dry autumn, California has been hit by a series of powerful winter storms that brought the wettest holiday season to the state in years.
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© 2026 The Associated Press. All rights reserved. This material may not be published, broadcast, written or redistributed.
California
California’s gubernatorial race heats up as Newsom’s term nears end, with many contenders
FRESNO, Calif. (FOX26) — In just over a year, Gavin Newsom’s term as California’s governor will come to an end, capping off nearly eight years in office.
Now the question is – who will take over once he steps down?
We spoke to political scientist Nathan Monroe about what could be one of Californias most unpredictable gubernatorial races yet.
With Governor Gavin Newsom’s term ending, the race to replace him begins.
This race will determine who leads the worlds fifth largest economy at a time when California is facing issues such as housing and affordability.
Californias next gubernatorial election is shaping up to be crowded – and for the first time in years – there’s no incumbent on the ballot.
“You say, well, just which democrat is going to win, right? Like, sort of republicans don’t have a shot. But what we have to keep in mind, right, is that the rules of elections matter. And in California, we have the top two primary system,” said Nathan Monroe, a Political Science Professor at UC Merced.
More than a dozen candidates are vying for the spot.
On the democratic side, contenders include former U.S. Secretary of Health and Human Services Xavier barrera, former U.S. Representative Katie Porter, Representative Eric Swalwell, former Los Angeles Mayor Antonio Villaraigosa, and former State Controller Betty Yee.
Political experts say the size of the field could make turnout and name recognition decisive and could lead to unexpected results in the primary.
“But if you divide that pie up by just two, and you divide the democratic pie up, which is admittedly a larger pie, by 7 or 8, the concern you get here is that democrats are going to lose out on even running to the general election. So even though there might be more democratic votes to be found in California for governor, they might not have a shot to cast those ballots for a democrat on the general election ballot,” said Monroe.
Monroe says party leaders may need to step in soon.
“I think the concern has to be among voters and I’m sure among the party leaders, so to speak, right, the party leaders sort of amorphously, is that they’ve got to figure out a way to delicately, you know, assure some candidates out of the race and figure out which candidates those should be and figure out how to manage those personalities and try to coordinate all the things that go in and around a gubernatorial election,” said Monroe.
On the Republican side, former Riverside County Sheriff Chad Bianco and Fox News contributor Steve Hilton.
With just a few months from the midterm elections, Monroe says both parties need to organize.
“What’s happening behind the scenes for the parties to try to coordinate themselves to make sure that the field that they offer to voters in June is a field that gives them the best chance for their best candidate to go forward to the general election,” said Monroe.
The primary election is set for June, with the general election in December.
California
Heavy rain, high tides cause flooding along stretch of Northern California
CORTE MADERA, Calif. (AP) — Heavy rain and high tides believed to be the most severe in two decades caused flooding in parts of Northern California on Saturday, prompting road closures and rescues of residents trapped in their cars.
Roadways through a 15-mile (24-kilometer) stretch from the Sausalito area to San Rafael were flooded after a downpour coincided with record-breaking “ King Tides,” Marin County Sheriff’s Sgt. Michael Dobbins said.
No injuries were reported but authorities were called to assist when cars got stuck in floodwater as high as three and four feet (1.1 and 1.2 meters), he said.
“There is a lot of water in the roadways,” Dobbins said, adding the tides were reportedly the highest in more than two decades. “Along with heavy rains, it just created the perfect storm for flooding on the streets.”
Authorities in the communities near San Francisco asked residents to stay home wherever possible until waters recede. Some residents kayaked along what normally would be city streets. Others waded out in water that passed their knees.
A flood warning was in place for the San Francisco area until 2 p.m. Saturday and an advisory until 2 p.m. Sunday, according to the National Weather Service in San Francisco.
King Tides occur when the sun, moon and Earth are in alignment and the moon is in its closest position to the Earth, creating a stronger gravitational pull.
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