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Turkey vultures indicate rodenticide prevalence near Los Angeles, California, despite state-wide bans

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Turkey vultures indicate rodenticide prevalence near Los Angeles, California, despite state-wide bans


Turkey Vultures are obligate scavengers that feed upon the carcasses of a wide diversity of species. Credit: Miguel D. Saggese

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).

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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.

  • Turkey vultures indicate rodenticide prevalence near Los Angeles, California, despite state-wide bans
    Wing-tagged Turkey Vultures are easily identified from a distance. Credit: Miguel D. Saggese
  • Turkey vultures indicate rodenticide prevalence near Los Angeles, California, despite state-wide bans
    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

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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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Signs of spring blooming at Antelope Valley California Poppy Reserve after wet, warm winter

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Signs of spring blooming at Antelope Valley California Poppy Reserve after wet, warm winter


It’s beginning to look a lot like spring!

The warm and wet weather this winter has led to the start of a dazzling super bloom at the Antelope Valley California Poppy Reserve.

“We had an unseasonably warm winter as well, so there’s actually a lot of growth,” said Callista Turney with California State Parks. “We’re having early wildflowers that are already at the park. So if you look at the poppy live cam, it shows a lot of orange already.”

The rain has helped the early blooms, but it’s actually the heat that accelerated the growth of the flowers.

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“It will actually speed up the growth of the plants, so some of them were already blooming and that’s going to cause those blossoms to accelerate faster towards seed production. And the blossoms that are in the process of being formed, those are going to open up soon as well.”

We also sometimes see great super blooms in Death Valley National Park, Anza-Borrego Desert State Park, Joshua Tree and the Mojave National Preserve.

“It’s definitely a rare occurrence because we don’t always have the right conditions. It’s gotta be the weather, the wind, the rain, all coming together,” said Katie Tilford, Director of Development and Communications with the Theodore Payne Foundation.

If it continues to stay unseasonably warm, we’ll see a shorter bloom. The key to a longer season is milder weather.


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Republican governor candidate Chad Bianco says he’s the ‘antithesis to California state government’

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Republican governor candidate Chad Bianco says he’s the ‘antithesis to California state government’


We are counting down to the California governor’s race. Chad Bianco, the sheriff of Riverside County, is one of the two biggest names running on the Republican ticket.

In a one-on-one interview with Eyewitness News political reporter Josh Haskell, Riverside County Sheriff Chad Bianco said, “I am the antithesis to California state government because I am going to take a nuclear bomb into that building and absolutely destroy everything that they do to us behind closed doors.”

Although he’s been elected by the voters twice, Bianco says he’s not a politician — which is why he believes his campaign for California governor is resonating, as reflected in the polls.

“President Trump, in one year, from 2025 when he took over, until now, did absolutely nothing to harm California. What’s harming California is 30 years of Democrat one-party rule that have created an environment here that no one can live in anymore. They’ve only been successful here in California because we vote D no matter what. You vote D or die. I mean, that’s it. Charles Manson would be elected in California if he was the only Democrat on the ballot,” Bianco said.

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Bianco isn’t the only conservative Republican running for governor, and according to polling, he’s neck-and-neck with former Fox News host Steve Hilton.

SEE ALSO: CA governor candidate Steve Hilton says ‘everybody supports’ Trump’s immigration policies

Leading in some polls in the wide-open California Governor’s race as the June primary creeps closer is Republican and former Fox News host Steve Hilton.

“Steve has no chance of winning in November. The Democrats know that I’m going to win in November, and so they have to do everything they can to keep me out of that,” Bianco said.

When asked about the affordability crisis in the state, Bianco said, “Almost the entire issue of affordability in California is because of regulation, excessive regulation imposed by government. Every single regulation can be signed away with the governor’s signature.”

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“It is a drug and alcohol addiction problem that, and a mental health problem,” he said about the homelessness crisis. “Every single bit of money that is going to these nonprofits that say ‘homeless,’ zero money. You’re getting absolutely nothing. I can’t tell you that we would end what we see in the homeless situation within a year, but I guarantee you we would never see it again after two years.”

When challenged on that prediction, pointing to how the state doesn’t have the facilities to treat the number of people living on our streets, Bianco responded, “We have been conditioned to believe that buildings take five years to build. It takes 90 days or less to build a house, but in California, it takes three to five years because the government won’t allow it. The regulations that are destroying this state are going to be removed with me as the governor.”

Bianco also said California jails shouldn’t have to play the role of treatment facilities.

Although he says he supports the Trump administration and wants the president’s endorsement, Bianco has been traveling the state — meeting not just with Republicans, but Democrats and independents as well. He says all of our state government officials have failed.

The primary election is June 2.

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No clear front-runner in race for California governor, new poll shows

A new poll shows there’s still no clear front-runner in the race to replace Gov. Gavin Newsom.

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PlayOn Sports fined $1.1 million by California watchdog over student data violations

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PlayOn Sports fined .1 million by California watchdog over student data violations


California’s privacy watchdog has ordered PlayOn Sports to pay a $1.10 million fine and change how it handles consumer data after finding the company’s practices violated state law in ways that affected students and schools in the state.

The California Privacy Protection Agency Board issued the decision following a settlement reached by CalPrivacy’s Enforcement Division.

The decision is the first by the board to address privacy violations involving students and California schools.

Schools across the country use PlayOn Sports’ GoFan platform to sell digital tickets to high school sporting events, theater performances, and homecoming and prom dances, with attendees presenting tickets at the door on their mobile phones.

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Schools also use PlayOn Sports’ platforms for other sports-related activities, including attending games, streaming them online, and looking up statistics about teams and players.

In California, about 1,400 schools contract with PlayOn Sports for these services.

[RELATED] X faces possible fines as EU probes Grok nonconsensual, sexualized deepfakes

GoFan is also the official ticketing platform for the California Interscholastic Federation, the governing body for high school sports.

According to the board’s decision, PlayOn Sports used tracking technologies to collect personal information and deliver targeted advertisements to ticketholders and others using its services.

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The company allegedly required Californians to click “agree” to tracking technologies before they could use their tickets or view PlayOn Sports websites, without providing a sufficient opt-out option.

“Students trying to go to prom or a high school football game shouldn’t have to leave their privacy rights at the door,” said Michael Macko, CalPrivacy’s head of enforcement. “You couldn’t attend these events without showing your ticket, and you couldn’t show your ticket without being tracked for advertising. California’s privacy law does not work that way. Businesses must ensure they offer lawful ways for Californians to opt-out, particularly with captive audiences.”

The decision also describes students as a uniquely vulnerable population and warns that targeted advertising systems can subject students to profiling that can follow them for years, expose them to manipulative or harmful content, and develop sensitive inferences about their lives.

Instead of providing its own opt-out method, PlayOn Sports directed students and other users to opt out through the Network Advertising Initiative and the Digital Advertising Alliance, which the decision said violated the company’s responsibility to provide its own way for consumers to opt out. The company also allegedly failed to recognize opt-out preference signals and did not provide Californians with sufficient notice of its privacy practices.

“We are committed to making it as easy as possible for all Californians — from high school students to older adults, and everyone in between — to make the choice of whether they want to be tracked or not,” said Tom Kemp, CalPrivacy’s executive director. “Californians can opt-out with covered businesses, and they can sign up for the newly launched DROP system to request that data brokers delete their personal information.”

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Beyond the $1.10 million fine, the board’s order requires PlayOn Sports to conduct risk assessments, provide disclosures that are easy to read and understand, and implement proper opt-out methods.

The order also requires the company to comply with California’s privacy law prohibiting the selling or sharing of personal information of consumers between 13 and 16 without their affirmative opt-in consent.



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