ÐÇ¿Õ´«Ã½

Climate and Environment

    • Birds with bigger brains may cope with climate crisis better, study suggests

    Share

    Thousands of birds die each spring and fall when they collide with Chicago's skyscrapers, which lie on a major migration path between Canada and Latin America.

    But the birds don't die in vain. Since the 1970s, many of them have been . This unique and detailed set of data has been a scientific windfall, revealing that North American migratory birds appear to be shrinking in response to climate change.

    of this data has highlighted an important nuance in this trend: Birds that have bigger brains, relative to their body size, are not shrinking as much as their smaller-brained counterparts.

    The study is the first to identify a potential link between cognition and animal response to human-made climate change, according to the researchers from Washington University in St. Louis.

    "As temperatures warm, body sizes are decreasing," said Justin Baldwin, a doctoral student at Washington University and author of the study that published this week in the journal Ecology Letters, . "But larger-brained species are declining less strongly than small-brained species."

    Relative brain size is often considered an indicator of behavioral flexibility in birds, according to the research. The idea is controversial when it's applied to some other animals, Baldwin said, but it works for birds.

    "Relative brain size correlates with increased learning ability, increased memory, longer lifespans and more stable population dynamics," Baldwin said.

    "In this case, a bigger-brained species of bird might be able to reduce its exposure to warming temperatures by seeking out microhabitats with cooler temperatures, for example," he said.

    The researchers analyzed information from 70,000 birds that died when they collided with buildings in Chicago between 1978 and 2016. They added brain volume measurements and life-span data for 49 of the 52 species in the database.

    Birds that had big brains, relative to their bodies such as the song sparrow and other New World sparrows, had body-size reductions that were only about one-third of those observed for birds with smaller brains, the study found. Wood warblers (Parulidae) tended to have smaller brains and tended to shrink more.

    "The authors from that amazing study shared their raw data ... which allowed us to add to it and discover more," Baldwin said via email.

    SHAPE-SHIFTERS

    It's not known exactly why birds are shrinking in size. Larger body size helps animals in cold places stay warm, while a smaller body retains less heat.

    Bird wingspans may have increased to compensate for smaller bodies that produce less energy for the incredibly long distances traveled during migration, researchers have also found.

    Similarly, that some animals are developing larger beaks, legs and ears that allow them to better regulate body temperature as the planet gets hotter. While most of the morphological changes have been in birds, bats and shrews have also been affected. Climate change has even .

    However, downsizing comes at a potential cost for a bird, with an increased risk of falling prey to predators or making it harder to compete for resources with other bird species, said study coauthor Carlos Botero, assistant professor of biology at Washington University, in the statement.

    It's in this context that having a larger brain may offer alternatives that are not available to small-brained species, he said.

    "One of the first things that jumps out to me from these findings is that we can already see that climate change is having a disproportionate effect on species that have less capacity to deal with environmental change through their behavior," Botero said.

    "This doesn't mean that climate change is not affecting brainy birds ... or that brainy birds are going to do just fine. What our findings suggest is that climate change can have a much stronger effect on the less-brainy birds."

    CTVNews.ca ÐÇ¿Õ´«Ã½

    BREAKING

    BREAKING

    Three men were injured after trying to subdue a man armed with a knife during afternoon prayers at a Montreal-area mosque Friday afternoon.

    A 15-year-old boy who was the subject of an emergency alert in New Brunswick has been arrested.

    Police have arrested an 18-year-old woman who allegedly stole a Porsche and then ran over its owner in an incident that was captured on video.

    Since she was a young girl growing up in Vancouver, Ginny Lam says her mom Yat Hei Law made it very clear she favoured her son William, because he was her male heir.

    The search for a missing six-year-old boy in Shamattawa is continuing Friday as RCMP hope recent tips can help lead to a happy conclusion.

    Canada

    • BREAKING

      BREAKING

      Three men were injured after trying to subdue a man armed with a knife during afternoon prayers at a Montreal-area mosque Friday afternoon.

    • Police have arrested an 18-year-old woman who allegedly stole a Porsche and then ran over its owner in an incident that was captured on video.

    • The search for a missing six-year-old boy in Shamattawa is continuing Friday as RCMP hope recent tips can help lead to a happy conclusion.

    • The debate over sexual orientation and gender identity education in schools is heating up. Protests both for and against SOGI in the curriculum took place across the country Friday.

    • The parents of a teenager who died after allegedly consuming the poisonous products of a Mississauga man are now suing him, as well as several doctors involved in her care.

    • Relatives of a 60-year-old man who took his own life in a Nova Scotia jail after long periods of confinement in his cell have launched a lawsuit against the province.

    World

    Politics

    Health

    • A Nova Scotia woman has applied for a medically assisted death, saying after years of battling to receive out-of-country surgery for an illness that causes 'indescribable' pain, she struggles to maintain the will to live.

    Sci-Tech

    Entertainment

    • Getting a photograph of a rainbow? Common. Getting a photo of a lightning strike? Rare. Getting a photo of both at the same time? Extremely rare, but it happened to a Manitoba photographer this week.

    • It was the last show for longtime children's TV star Ron (Buck Shot) Barge Friday as hundreds of family, friends and fans attended a public memorial in Calgary.

    Business

    Lifestyle

    Sports

    • The Winnipeg Blue Bombers have won five in a row. The Edmonton Elks have won five of their last six games. They are the two hottest teams in the West. When they meet Saturday at Commonwealth Stadium, something has to give.

    • Agreement in principle has been reached to build a new NHL arena at LeBreton Flats has been reached between the Ottawa Senators and the National Capital Commission (NCC), the two sides announced Friday.

    • F1 star Max Verstappen punished over bad word

      Formula One points leader Max Verstappen was ordered to 'accomplish some work of public interest' after uttering an inappropriate word Thursday at the news conference ahead of the Singapore Grand Prix.

    Autos

    Local Spotlight

    Getting a photograph of a rainbow? Common. Getting a photo of a lightning strike? Rare. Getting a photo of both at the same time? Extremely rare, but it happened to a Manitoba photographer this week.

    An anonymous business owner paid off the mortgage for a New Brunswick not-for-profit.

    They say a dog is a man’s best friend. In the case of Darren Cropper, from Bonfield, Ont., his three-year-old Siberian husky and golden retriever mix named Bear literally saved his life.

    A growing group of brides and wedding photographers from across the province say they have been taken for tens of thousands of dollars by a Barrie, Ont. wedding photographer.

    Paleontologists from the Royal B.C. Museum have uncovered "a trove of extraordinary fossils" high in the mountains of northern B.C., the museum announced Thursday.

    The search for a missing ancient 28-year-old chocolate donkey ended with a tragic discovery Wednesday.

    The Royal Canadian Mounted Police is celebrating an important milestone in the organization's history: 50 years since the first women joined the force.

    It's been a whirlwind of joyful events for a northern Ontario couple who just welcomed a baby into their family and won the $70 million Lotto Max jackpot last month.

    A Good Samaritan in New Brunswick has replaced a man's stolen bottle cart so he can continue to collect cans and bottles in his Moncton neighbourhood.

    • The debate over sexual orientation and gender identity education in schools is heating up. Protests both for and against SOGI in the curriculum took place across the country Friday.

    • A fire that destroyed a historic bridge in Kamloops, B.C., is now being investigated as arson, local Mounties say.

    • A teenager has been charged with multiple offences related to stabbings that occurred in Surrey's Newton neighbourhood last week.

    • Police have arrested an 18-year-old woman who allegedly stole a Porsche and then ran over its owner in an incident that was captured on video.

    • The parents of a teenager who died after allegedly consuming the poisonous products of a Mississauga man are now suing him, as well as several doctors involved in her care.

    • Michael Ford, Ontario's minister of citizenship and multiculturalism, says he is taking a leave of absence from cabinet to prioritize his health.

    • Calgary Mayor Jyoti Gondek is urging the Alberta government to preserve pieces of the massive Green Line transit project now being dissolved.

    • A Lethbridge resident is facing charges after police seized drugs and weapons at a traffic stop for bicycle equipment violations.

    • It was the last show for longtime children's TV star Ron (Buck Shot) Barge Friday as hundreds of family, friends and fans attended a public memorial in Calgary.

    • Agreement in principle has been reached to build a new NHL arena at LeBreton Flats has been reached between the Ottawa Senators and the National Capital Commission (NCC), the two sides announced Friday.

    • Police say a man, 34, who was taken to hospital in critical condition after being shot Thursday night has died.

    • Ottawa police are investigating a shooting downtown Friday afternoon.

    • BREAKING

      BREAKING

      Three men were injured after trying to subdue a man armed with a knife during afternoon prayers at a Montreal-area mosque Friday afternoon.

    • When Bernard Morissette got a call from Loto-Quebec on Sept. 18 and was asked if he was sitting down, he had no idea what was coming his way.

    • "We love you, Eddy!" screamed the 350 students at Terry Fox Elementary School in Pierrefonds. They didn't know the man their school is named after, but they knew Eddy Nolan who would visit regularly and encourage the students to participate in "the Terry Fox Run".

    • Mounties say there was an increased police presence in the Emerald Hills area of Sherwood Park on Friday morning as officers searched for a man who is wanted by police.

    • There's a friendship in the Edmonton Oilers crease between Stuart Skinner and Calvin Pickard.

    • There are plenty of fun happenings in Edmonton this weekend. It's time to savour that last little bit of the summer season before the leaves really start coming down.

    • A 15-year-old boy who was the subject of an emergency alert in New Brunswick has been arrested.

    • Relatives of a 60-year-old man who took his own life in a Nova Scotia jail after long periods of confinement in his cell have launched a lawsuit against the province.

    • Family, friends and fans of late hip hop artist and battle rapper, Pat Stay will gather at events held in his honour on Saturday and Sunday.

    • The search for a missing six-year-old boy in Shamattawa is continuing Friday as RCMP hope recent tips can help lead to a happy conclusion.

    • Pedestrians are getting a step closer to being able to cross Portage and Main.

    • A Manitoba veterinary clinic has two new ways of figuring out what’s causing a horse to be lame.

    • Five Regina schools have been placed in lockdown or secure the building mode following a report of a weapons investigation at Miller High School on Friday.

    • A 21-year-old man from Codette, Sask. is facing numerous charges in connection to a fatal crash near Wapella, Sask. Wednesday night that claimed the life of a 22-year-old Alberta woman.

    • The City of Regina and provincial government have committed a combined $400,000 to Carmichael Outreach for an 80-person warming space set to open no later than Nov. 1.

    • Protests were held in front of Kitchener City Hall on Friday, both for and against LGBTQ2S+ inclusive education and queer rights in schools.

    • Levels of hydrogen sulfide gas are being monitored at Brantford Collegiate Institute after a leak in their geothermal system.

    • Police have arrested an 18-year-old woman who allegedly stole a Porsche and then ran over its owner in an incident that was captured on video.

    • The Métis Nation of Saskatchewan has pulled out of a national body representing Métis, citing problems with an Ontario group and throwing the future of the Métis National Council into question.

    • The second-degree murder trial of Thomas Hamp is being adjourned until December so an expert witness central to the trial can testify.

    • A 69-year-old woman from Outlook, Saskatchewan is dead and three people are injured after a truck and SUV collided on Highway 15 on Thursday.

    • Emergency crews in northern Ontario found the bodies of four people inside a home where a fire broke out Thursday night.

    • Police have arrested an 18-year-old woman who allegedly stole a Porsche and then ran over its owner in an incident that was captured on video.

    • A 26-year-old driver from Surrey, B.C., has been charged with three counts of criminal negligence causing death and bodily harm in a crash that killed two youths in northern Ontario last year.

    • On Thursday, just before noon, emergency services were called to the area of Curtis Street and Hiawatha Street due to reports of a couch on fire.

    • The timeline is short, but London officials are confident in their ability to submit a strong application for a Homelessness and Addiction Recovery Treatment (HART) Hub that the province will begin funding next year.

    • A man is in hospital with life threatening injuries following a collision between a motorcycle and a vehicle on Friday afternoon.

    • Two men from Barrie have been charged after a deadly shooting at a park in Keswick on Wednesday.

    • A 17-year-old from Markham is facing serious charges after an August 11 shooting at a party in Caledon.

    • Provincial police are investigating vandalism in Huntsville after the "senseless destruction" of flower displays along Main Street East.

    • The Special Investigations Unit (SIU) is searching for the occupants of a vehicle caught on security cameras during a fatal police-involved shooting on Goyeau Street.

    • Windsor police say a 25-year-old mother has been charged with the drowning death of her 5-year-old child in the family’s backyard pool.

    • The University of Windsor has been given the privilege of hosting the 2026 U Sports men’s volleyball championship at the Toldo Centre.

    • New Democrat Leader David Eby has launched his British Columbia election campaign a day early, making the key battle ground of Surrey his first stop.

    • The Old Man Lake wildfire near Sooke is the only one currently burning on Vancouver Island. It’s a region of the province that this year saw a drastic drop in blazes in the backcountry.

    • The debate over sexual orientation and gender identity education in schools is heating up. Protests both for and against SOGI in the curriculum took place across the country Friday.

    • A pair of runaway pigs are in the custody of an animal sanctuary in the Okanagan after evading police and volunteers for hours earlier this week.

    • The Red Bridge, a historic landmark in Kamloops, B.C., was completely destroyed by fire early Thursday morning.

    • Animal protection officers in British Columbia have rescued three pit bulls – including one that gave birth to 10 puppies – from a rat-infested home in Kelowna.

    • A Lethbridge resident is facing charges after police seized drugs and weapons at a traffic stop for bicycle equipment violations.

    • A Vulcan, Alta., man has been charged with a Lethbridge woman's murder after her body was found in the Oyen area.

    • A Lethbridge couple got a good reminder as to why you should keep your vehicle doors locked at all times.

    • A 26-year-old driver from Surrey, B.C., has been charged with three counts of criminal negligence causing death and bodily harm in a crash that killed two youths in northern Ontario last year.

    • Ontario Provincial Police say three suspects from southern Ontario have been charged and drugs worth $300,000 have been seized following a traffic stop Sept. 16.

    • A Brampton driver, 27, was charged this week when northern Ontario police stopped the SUV he was driving on Highway 17 after a reported shooting and found more than $100,000 in cash.

    N.L.

    Shopping Trends

    The Shopping Trends team is independent of the journalists at CTV News. We may earn a commission when you use our links to shop. Read about us.

    Stay Connected
    Follow CTV News