California
Carnivorous squirrels documented in California
A ground squirrel with cheeks stuffed with nuts, seeds or grains is a common sight. But a new study provides the first evidence that California ground squirrels also hunt, kill and eat voles. The study, led by the University of Wisconsin-Eau Claire and University of California, Davis, is the first to chronicle widespread carnivorous behavior among squirrels.
Published in the Journal of Ethology, the study fundamentally changes our understanding of ground squirrels. It suggests that what was considered a granivorous species actually is an opportunistic omnivore and more flexible in its diet than was assumed.
The observations occurred in 2024—the 12th year of the Long-term Behavioral Ecology of California Ground Squirrels Project conducted at Briones Regional Park in Contra Costa County. Out of 74 observed interactions with voles between June and July, 42% involved active hunting of these small rodents by ground squirrels.
“This was shocking,” said lead author Jennifer E. Smith, an associate professor of biology at UW-Eau Claire who leads the long-term ground squirrels project with Sonja Wild of UC Davis.
“We had never seen this behavior before. Squirrels are one of the most familiar animals to people. We see them right outside our windows; we interact with them regularly. Yet here’s this never-before-encountered-in-science behavior that sheds light on the fact that there’s so much more to learn about the natural history of the world around us.”
Wild has observed hundreds of squirrels in nature and yet, even for her, when the undergraduate students came in from field work and told her what they had witnessed, she said, “No, I’m not sure what you’re referring to.” Then she watched the video.
“I could barely believe my eyes,” said Wild, a postdoctoral research fellow in the UC Davis Environmental Science and Policy department. “From then, we saw that behavior almost every day. Once we started looking, we saw it everywhere.”
Opportunists amid rapid change
Through videos, photos and direct observations at the regional park, the authors documented California ground squirrels of all ages and genders hunting, eating and competing over vole prey between June 10 and July 30.
The squirrels’ carnivorous summer behavior peaked during the first two weeks of July, coinciding with an explosion of vole numbers at the park reported by citizen scientists on iNaturalist. This suggests the squirrels’ hunting behavior emerged alongside a temporary increase in the availability of prey, the study said. The scientists didn’t observe the squirrels hunting other mammals.
“The fact that California ground squirrels are behaviorally flexible and can respond to changes in food availability might help them persist in environments rapidly changing due to the presence of humans,” Wild said.
Smith added that many species, including the California ground squirrel, are “incredible opportunists.” From raccoons and coyotes to spotted hyenas and humans, the flexibility these mammals apply to their hunting strategies helps them change and adapt with the human landscape.
“Through this collaboration and the data coming in, we’re able to document this widespread behavior that we had no idea was going on,” Smith said. “Digital technology can inform the science, but there’s no replacement for going out there and witnessing the behavior because what animals are doing always surprises us.”
The researchers said many questions remain unanswered, including how widespread hunting behavior is among squirrels, whether and how it is passed down from parent to pup, and how it affects ecological processes.
The authors are also excited to return to the field next summer to see what impact, if any, this year’s vole hunting may have on squirrel reproduction compared to the past decade.
More information:
Vole hunting: Novel predatory and carnivorous behavior by California ground squirrels, Journal of Ethology (2024). DOI: 10.1007/s10164-024-00832-6
Citation:
Carnivorous squirrels documented in California (2024, December 18)
retrieved 18 December 2024
from https://phys.org/news/2024-12-carnivorous-squirrels-documented-california.html
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California
Man charged with murder, kidnapping their 5-year-old child before fleeing to Mexico
A 40-year-old Los Angeles man was charged with murder after allegedly killing his girlfriend and kidnapping their young child before fleeing to Mexico, according to authorities.
Ruben Fregosojuarez has been charged one count of murder and one misdemeanor count of child abuse under circumstance or conditions other than great bodily injury or death, according to a Los Angeles County District Attorney’s Office news release. Authorities first identified him as Ruben Fregoso but Los Angeles County prosecutors listed him as Ruben Fregosojuarez.
On Monday around 12:39 p.m., the Los Angeles Police Department conducted a welfare check in the 2600 block of South Alsace Avenue in West Adams, police said in a news release.
Officers found a woman dead inside the home “as a result of violence” and the woman’s daughter missing, police said. On Monday night, the California Highway Patrol issued an Amber Alert for the child, Daleza.
Photos obtained by NBC4 appear to show Fregosojuarez in a parking garage in San Ysidro with the girl on Sunday. The California Highway Patrol has listed her age as 4 years old but Los Angeles police say the girl is 5. She is also described as the suspect’s daughter.
The alert said that the girl was last seen with Fregosojuarez, who allegedly abducted her in a 2019 Land Rover Discovery, on Sunday at about 4 a.m.
The CHP posted in an update that the vehicle was found but that the child and man were still missing. The girl is described as 3 feet tall, 45 pounds, and having black hair and brown eyes.
California
23andMe Sued by California Over Massive 2023 Data Breach
California’s attorney general is suing the consumer genetics testing company formerly known as 23andMe, alleging the company failed to protect customers’ sensitive personal information in a massive 2023 data breach that exposed the ancestry and genetic data of nearly 7 million people.
Attorney General Rob Bonta filed the lawsuit on Thursday in San Francisco Superior Court against Chrome Holding Co., formerly known as 23andMe, accusing the company of failing to properly investigate or respond to numerous warnings that its systems had been compromised. The company’s mail-in self-testing kits became synonymous with DNA testing before it filed for bankruptcy in 2025.
In 2023, cybercriminals breached 23andMe’s systems by using a “credential-stuffing attack,” which involves bombarding online accounts with huge sets of user names and passwords stolen in previous unrelated attacks. Over a period of months, the intruders were able to make off with the personal data of more than 6.9 million people.
“23andMe’s security measures were so lax that the threat actor was able to operate undetected within 23andMe’s systems for over five months, and remarkably, 23andMe only began investigating after the threat actor offered the stolen user data for sale on the dark web and reached out to 23andMe to demand a ransom,” Bonta’s office said in the complaint.
The San Francisco-based company, which allowed people to submit genetic materials and get a snapshot of their ancestry, revealed in October 2023 that hackers had accessed customer information in the prolonged data breach that targeted customers with Chinese or Ashkenazi Jewish ancestry. The stolen data of more than 1 million Asian-Pacific Islander and Ashkenazi Jewish users was later posted for sale on the dark web.
“The sale of this data on the dark web took place amidst a period of mounting anti-Asian American and Pacific Islander and antisemitic hate and violence,” Bonta said in a press release. “This is disturbing and incredibly dangerous.”
A January 2024 lawsuit accused the company of not doing enough to protect its customers and not notifying certain customers that their data had been targeted specifically. It later settled the lawsuit for $30 million.
23andMe representatives didn’t immediately respond to a request for comment.
At its peak, 23andMe became the best-known name in the emerging area of DNA self-testing, with users paying upwards of $99 for kits that gave them insights into their genetic makeup, potential relatives and ancestry. But the company’s momentum slowed down in recent years after its $3.5 billion public offering in 2021.
Last July, TTAM Research Institute, a nonprofit led by Anne Wojcicki, 23andMe’s cofounder and former CEO, acquired 23andMe’s assets for $305 million.
California
Newsom signs law to shield California elections from federal interference
Gavin Newsom, California’s governor, signed legislation Wednesday that aims to shield California elections from federal interference, saying he expected Donald Trump’s administration to try to meddle in the midterms this year.
The law, which took effect immediately and came days before next Tuesday’s primary, prohibits any person – including federal agents – from accessing voter rolls or election technology without a court order. Law enforcement officers are restricted from disrupting election workers, except in public safety emergencies.
Trump administration officials so far have said they have no plans to send immigration agents to polling locations across the US, a concern raised this year by several Democratic secretaries of state. But Newsom warned “we have to be prepared for everything” because “there’s no rules any more with the Trump administration”.
Voting is already under way in California’s closely watched primary for governor, where a crowded field of Democrats and two viable Republicans are vying for just two spots on the November ballot. Under the state’s open primary system, only the top two vote-getters advance to the general election, regardless of party affiliation.
Newsom, who cannot seek a third term, said the election law is a response to “legitimate anxiety” about Trump’s tactics, primarily in Democratic-led states, where the president has deployed federal agents over the objections of local leaders. The Democratic governor warned against underestimating someone who “doesn’t believe in free and fair elections”.
“I expect the worst with Trump because he’s done the worst,” he said at a news conference.
White House spokesperson Abigail Jackson told the Associated Press later Wednesday that Trump is committed to ensuring that Americans have full confidence in the administration of elections.
“Instead of levying false attacks at the President, Newscum should look in the mirror,” she said in a statement, using Trump’s derogatory nickname for Newsom.
In an interview last year with Vanity Fair, Susie Wiles, the White House chief of staff, knocked down the idea that Trump would deploy the military to suppress voting, saying it was “categorically false”.
The California law also makes it a crime to knowingly take voted ballots out of the custody of election officials.
Earlier this year, the FBI under Trump seized the 2020 general election ballots from Georgia’s most populous county, which is heavily Democratic and has long been at the center of the president’s false claims that fraud cost him the race. The FBI and justice department also have sought records from previous elections in the largest counties in Arizona and Michigan.
Trump triggered a national redistricting frenzy ahead of the midterms when he urged Republicans in Texas and elsewhere to redraw their US House districts to help the party retain control of the closely divided chamber. Missouri, North Carolina, Ohio, Florida and Tennessee also have enacted new maps that could benefit Republicans, and Louisiana is expected to be next.
Republicans so far think they could gain as many as 14 seats from redistricting in November, while Democrats think they could gain six in California and Utah.
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