麻豆影视

Skip to main content

Hawks to hummingbirds: Study finds roads quieted by COVID-19 fill with birdsong

Birds swim in the waters of Lake Ontario overlooking the city of Toronto skyline in Mississauga, Ont., Thursday, Jan. 24, 2019. THE CANADIAN PRESS/Nathan Denette Birds swim in the waters of Lake Ontario overlooking the city of Toronto skyline in Mississauga, Ont., Thursday, Jan. 24, 2019. THE CANADIAN PRESS/Nathan Denette
Share

New research shows that roads and runways quieted by COVID-19 are filling with birdsong instead.

drawing on millions of sightings by amateur birders across North America that looked at how reduced travel in response to the pandemic has affected birds from hawks to hummingbirds.

"We're focusing on where birds were seen during the pandemic compared to where they were seen in previous years," said lead author Nicola Koper.

"We saw quite strong changes in where birds were seen relative to ... traffic before the pandemic compared with during the pandemic."

To find answers, Koper and her colleagues looked to eBird, an online collaboration managed by Cornell University that brings together and organizes observations by hundreds of thousands of amateur birdwatchers.

The team crunched through 4.3 million individual bird sightings made between March and May from 2017 to 2020 across Canada and the United States. They located those sightings relative to major roadways, airports, and dense urban environments, compensating statistically for how the pandemic may have affected the behaviour of the birders themselves.

They then correlated those sightings with data on COVID-19 restrictions in each county for which they could get information. Koper said that the method ensures any changes were due to pandemic measures.

"If the effects are actually due to lockdowns, then we should see the biggest changes in behaviour in the places that have the biggest changes in traffic -- close to major roads, airports and in counties that had the strongest lockdowns."

That's exactly what they found. Of the 82 bird species in the study, 80 per cent of them changed their behaviour in places where the pandemic had altered circumstances.

"Almost all the species we studied did change their location," Koper said.

Almost always, bird sightings were more abundant post-pandemic. Species were 14 times more likely to show increased rather than decreased counts.

The observation held even with birds that are most commonly seen in built environments -- robins, for example.

"Even those species that we think of as being well-adapted to human landscapes are much more sensitive to them than we think," said Koper. "These common species have been much more impacted by humans than we recognized."

Some species sightings declined. Coots, a white-billed water bird common to sloughs and wetlands, were seen less often.

And some species went both up and down, depending on where you looked. Red-tailed hawks were seen more often along urban-rural margins, but less often near busy roadways.

"Maybe it had to do with less roadkill," Koper suggested.

The lesson from the research is that human-impacted environments -- even asphalt-covered ones -- are not necessarily avian dead zones. Given a little consideration, Koper said birds will live there.

"There's quite a lot of things we can do to reduce traffic," she said.

Public transit would cut cars on the roads. So would working from home. Electric vehicles would at least cut the noise.

"There's habitat out there that isn't being fully utilized by birds," said Koper. "It's suitable except for the presence of traffic."

Previous studies have found that the number of birds in Canada and the U.S. has declined by 29 per cent over the past 50 years. Habitat loss is the biggest reason and anything that would give birds more room to live would help, Koper said.

"Habitat loss is the most significant problem that birds are facing today."

This report by The Canadian Press was first published Sept. 22, 2021.

CTVNews.ca Top Stories

A teen charged with the murder of another teen on Prince Edward Island last year has pleaded guilty to a lesser charge of manslaughter.

BREAKING

BREAKING

The jury tasked with determining if Canadian musician Jacob Hoggard sexually assaulted a young woman in northeastern Ontario eight years ago began deliberating Friday after nearly two weeks of testimony that saw the singer and his accuser give starkly different accounts of what happened.

BREAKING

BREAKING

A northeastern Ontario jury has started deliberating in Canadian musician Jacob Hoggard's sexual assault trial, we can now tell you what they weren't allowed to hear.

A 21-year-old man who was charged with attempted murder in the shooting of a Toronto police officer this week was out on bail at the time of the alleged offence, court documents obtained by 麻豆影视 Toronto show.

Local Spotlight

Chantal Kreviazuk is set to return to Winnipeg to mark a major milestone in her illustrious musical career.

From the beaches of Cannes to the bustling streets of New York City, a new film by a trio of Manitoba directors has toured the international film festival circuit to much pomp and circumstance.

A husband and wife have been on the road trip of a lifetime and have decided to stop in Saskatchewan for the winter.

The grave of a previously unknown Canadian soldier has been identified as a man from Hayfield, Man. who fought in the First World War.

A group of classic car enthusiasts donated hundreds of blankets to nursing homes in Nova Scotia.

Moving into the second week of October, the eastern half of Canada can expect some brisker fall air to break down from the north

What does New Westminster's t蓹m蓹sew虛tx史 Aquatic and Community Centre have in common with a historic 68,000-seat stadium in Beijing, an NFL stadium and the aquatics venue for the Paris Olympics? They've all been named among the world's most beautiful sports venues for 2024.

The last living member of the legendary Vancouver Asahi baseball team, Kaye Kaminishi, died on Saturday, Sept. 28, surrounded by family. He was 102 years old.

New data from Greater Vancouver and the Fraser Valley shows a surge in supply and drop in demand in the region's historically hot real estate market.