Experts in the US fear a rising number of “super pigs” that are proving tough to eradicate could invade northern states.
As a cross-breed combining the Eurasian boar’s survival skills with the size and fertility of domestic swine in Canada, the “super pig” is described as an “ecological train wreck”.
Professor Ryan Brook, one of Canada’s authorities on the issue, added they are the “most invasive animal on the planet”, with the swine capable of spreading disease and devastating crops and wildlife.
“Nobody should be surprised when pigs start walking across that border, if they haven’t already,” Professor Brook said.
“The question is: what will be done about it?”
Northern states like Minnesota, North Dakota and Montana are taking steps to stop the invasion, but it isn’t easy to control the spiralling population.
The pigs are smart and furry, giving them the edge to survive Canadian winters, and they reproduce extremely quickly.
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One sow can have six piglets in a litter and raise two litters in a year – which means that even if authorities managed to eliminate 65% of the population each year, they’d still grow.
And hunting could make the problem worse, according to Professor Brook, with the success rate for hunters only about 2- 3%.
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Image: The pigs are described as the most invasive animal on the planet. Pic: St. Louis Post-Dispatch via AP
Several states have also banned hunting because it makes the pigs more wary and nocturnal, which makes them tougher to track down.
Instead, methods under consideration are ground traps – like the so-called “BoarBuster” – or net guns fired from helicopters.
Some states have also adopted crowdsourced “Squeal on Pigs” tracking programs, while scientists have studied poisons such as sodium nitrite, but they risk harming other species.
“The only path forward is you have to be really aggressive and you have to use all the tools in the toolbox,” Professor Brook said.
The animals are not native to North America, but have roamed there for centuries.
The problems in Canada date back to the 1980s, when farmers were encouraged to raise wild boar, before the market collapsed in 2001 and some frustrated farmers simply set the animals free.
Donald Trump has responded after Elon Musk said some of his recent social media posts about the US president “went too far”.
The Tesla and SpaceX boss shared a series of posts on his X social media platform last week, including one which described Mr Trump’s sweeping tax and spending bill as a “disgusting abomination”.
Posting on X this morning, Mr Musk said: “I regret some of my posts about President @realDonaldTrump last week. They went too far.”
In response, the president is quoted as telling the New York Post: “I thought it was very nice that he did that.”
The publication said it spoke to Mr Trump in a brief phone conversation.
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19:32
Musk and Trump’s bust-up
The White House dismissed Mr Musk’s Epstein claims at the time, with press secretary Karoline Leavitt saying: “This is an unfortunate episode from Elon, who is unhappy with the One Big Beautiful Bill [a Republican tax and spending bill] because it does not include the policies he wanted.
“The president is focused on passing this historic piece of legislation and making our country great again.”
Mr Musk did not specify which posts he regretted.
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1:58
Could the Musk-Trump fallout stall US space goals?
In another post last Thursday, Mr Musk attacked Mr Trump’s tariffs, saying they “will cause a recession in the second half of this year”.
In response, Mr Trump, in an interview with ABC News, said Mr Musk had “lost his mind”. He also threatened to cancel government contracts with the businessman’s companies and said he had asked the billionaire to leave the White House.
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4:02
Trump and Musk’s feud explained
But yesterday, Mr Musk’s father Errol Musk told Sky News’ Moscow correspondent Ivor Bennett: “It’s like any argument. Everybody at some point says I’ll never make up, but then they do later.”
He said the argument likely happened because of “emotions welling out of hand”.
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0:46
Elon’s dad on the Musk-Trump bust-up
“They’ve had five months of intense day and night, hardly any sleep, and anybody who went through that would know your nerves are pretty much shredded after that time.”
He also said his son had texted him to say: “Don’t worry, we’re sorting it out.”
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A curfew has come into force in Los Angeles as officials attempt to “stop the vandalism and stop the looting”.
Mayor Karen Bass said the restrictions will be in force in downtown areas of the city from 8pm to 6am local time (4am to 2pm UK time) – and will likely be repeated in the coming days.
She confirmed that a local emergency had been declared as “we reached a tipping point”, with 23 businesses looted on Monday night.
Ms Bass said “graffiti is everywhere”, with “significant damage” to properties as a result of the protests.
Image: Workers try to remove graffiti after a protest over immigration raids. ICE Pic: AP/Damian Dovarganes
Image: Workers remove graffiti from the Ronald Reagan Federal Building in Santa Ana. Pic: Mindy Schauer/The Orange County Register via AP
Image: A protester marches past businesses being boarded up. Pic: Reuters/Leah Millis
Jim McDonnell, the chief of the Los Angeles Police Department, described the curfew as a “necessary measure to protect lives” as “unlawful and dangerous behaviour” had been escalating in the last few days.
On Tuesday alone, 197 arrests were made by the force, and he warned anyone violating the curfew without a valid reason would be detained.
Residents, people who are homeless, those travelling to and from work, credited media as well as public safety and emergency personnel, will be exempt from the curfew.
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The curfew covers a one square mile section of downtown LA that includes the area where protests have happened since Friday. The city of Los Angeles encompasses about 500 square miles.
Image: Workers board up a store in Santa Ana. Pic: AP/Jae C. Hong
Image: California National Guard soldiers stand at a federal agency building. Pic: AP
Image: Protesters are detained by law enforcement near the federal building in downtown LA. Pic: AP/Eric Thayer
The protests are in response to raids carried out by the US Immigration and Customs Enforcement agency (ICE).
US President Donald Trump has activated 4,000 National Guard troops – the federal reserve force – to protect ICE officers carrying out raids as well as federal buildings in LA, despite objections by California Governor Gavin Newsom, who called the deployments unnecessary, illegal and politically motivated.
Mr Trump also sent 700 marines, who are expected to start operating in the LA area on Wednesday, according to the US Northern Command.
Image: The Ronald Reagan Federal Building and Courthouse in Santa are boarded up. Pic: Mindy Schauer/The Orange County Register via AP
Image: National Guard troops are lined up to protect a federal building in downtown LA. Pic: AP/Eric Thayer
State officials said Mr Trump’s response was an extreme overreaction to mostly peaceful demonstrations, with California senators Adam Schiff and Alex Padilla saying the domestic mobilisation of active-duty military personnel should only happen “during the most extreme circumstances, and these are not them”.
Mr Trump defended his decision in a speech to soldiers at the Army base in Fort Bragg, North Carolina, saying his administration would “liberate Los Angeles”.
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0:49
Trump: ‘We will liberate Los Angeles’
“Generations of Army heroes did not shed their blood on distant shores only to watch our country be destroyed by invasion and third-world lawlessness,” Mr Trump said.
“What you’re witnessing in California is a full-blown assault on peace, on public order and on national sovereignty, carried out by rioters bearing foreign flags.”
Image: A protester is arrested by law enforcement officers in downtown LA. Pic: AP/Eric Thayer
Image: California Highway Patrol officers clash with protesters in LA. Pic: AP/Eric Thayer
Gavin Newsom launched a blistering response in an address on Tuesday evening, saying the deployment of the National Guard without consulting Californian officials was a “brazen abuse of power by a sitting president”.
He said it “enflamed a combustible situation, putting our people, our officers and even our National Guard at risk”.
“That’s when the downward spiral began. He doubled down on his dangerous National Guard deployment by fanning the flames even harder – and the president, he did it on purpose,” Mr Newsom said.
Newsom takes the fight to Trump
California Governor Gavin Newsom’s televised address to the nation felt presidential as he took the fight to the man in the Oval Office, with a series of scorching putdowns.
He made a compelling case that Donald Trump’s extraordinary decision to send troops to LA against his wishes had put the country on the brink of authoritarianism.
He spoke the day after the Pentagon announced 700 marines were being deployed to join 4,000 National Guard troops ordered to the streets of LA by Trump.
But there has been no evidence so far that local law enforcement is being overwhelmed by the size or might of this resistance movement.
The head-to-head between Trump and Newsom is a compelling one.
The governor is known to harbour presidential ambitions for 2028 and is something of a MAGA bogeyman.
Newsom presides over a blue state, the biggest in the country, and is growing his brand with a podcast and – now – Trump has effectively put him in the national spotlight by bringing this political battle to his door.
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The governor accused Mr Trump of choosing escalation and “theatrics over public safety”, as the situation was “winding down” before the president deployed the troops.
Mr Newsom added: “When Donald Trump sought blanket authority to commandeer the National Guard, he made that order apply to every state in this nation.
“This is about all of us, this is about you. California may be first, but it clearly won’t end here; other states are next. Democracy is next. Democracy is under assault before our eyes.”
Image: A man holds a Mexican flag, which has become synonymous with solidarity for migrants targeted in the raids. Pic: AP/Damian Dovarganes
Image: A protester holds up a placard while marching through downtown LA. Pic: Reuters/Leah Millis
Image: People protest against the ongoing immigration raids in Washington, D.C. Pic: AP/Julia Demaree Nikhinson
Homeland Security said on Monday that ICE had arrested 2,000 immigration offenders per day recently, which significantly exceeds the 311 daily average in the fiscal year 2024 under former president Joe Biden.
The protests over the immigration raids have started to spread across the US, with demonstrations in cities like Seattle, Austin, Chicago and Washington, DC.
While chaos in Los Angeles continues, with a curfew in place in the city to prevent further unrest, Donald Trump spent the day hunkered down in a bunker with helicopters soaring above and drones buzzing by at a celebration of the US army’s birthday.
US correspondents Mark Stone in Washington DC and Martha Kelner in LA discuss the parallels between the president’s display of military celebration, and sending troops in to restore law and order against protesters.
Plus, as US and Chinese negotiators meet in London to try and resolve the ongoing trade war between the two nations, Mark and Martha ask what’s at stake.
If you’ve got a question you’d like the Trump100 team to answer, you can email it to trump100@sky.uk.