Traffic takes toll on bird species

Up to a fifth of some British bird species meet their deaths on the roads each year, a researcher told the association meeting. But species such as magpies and crows were benefiting from the thousands of small, feathered corpses left at the wayside.

Chris Mead, of the British Trust for Ornithology, said that a few species were now known to be particularly vulnerable - such as barn owls, which huntalong long roads. Of 48 barn-owls which he had ringed recently, nine were recovered dead after being hit.

But Mr Mead thought collisions were also a significant cause of mortality in dozens of other species and a likely factor in the decline of the house sparrow. It may be one of Britain's most common birds but its numbers have fallen noticeably in urban and rural areas in recent decades.

"My own guess is that between 3 and 20 per cent of vulnerable British birds are killed each year on the roads," he said. About 100 species were vulnerable, he added - birds which flit between hedgerows, or which chase each other furiously in territorial disputes.

"It's the busier rural roads such as two-lane A roads which are the real killers," he said. "Motorways are probably much safer because the amount of noise and movement and their width keeps many small birds from attempting to cross them."

Mr Mead said the increase in average speeds of cars was adding to the cull. Young, inexperienced birds were specially vulnerable. "We're cruising at over the crucial level of 45-50mph - faster than that and there is little chance of them being able to react," he said. He believes that one reason why the magpie population has soared is because collisions provide them with carrion when food would otherwise be scarce.

But vehicle strikes are not the only danger that traffic poses to birdlife. From the Netherlands comes research which shows that willow warblers more than a mile from motorways are affected by the noise which "makes it difficult for them to hear each other, which they need to do in defending territory and attracting mates".

As well as new roads destroying habitat, they are also preventing individuals of a species from dispersing. Penny Anderson, an environmental consultant, cited other research from the Netherlands which examined the genetics of a population of frogs confined to a triangle of land by roads and railway. Over the decades their genetic diversity shrank because the limited population could only inbreed.

Start your day with The Independent, sign up for daily news emails
Voices
There will be a chance to bid for a rare example of the SAS Diary, collated by a former member of the regiment in the aftermath of World War II but only published – in a limited run of just 5,000 – in 2011
charity appealTime is running out to secure your favourite lot as our auction closes at 2pm tomorrow
Arts and Entertainment
Mark Wright has won The Apprentice 2014
tvThe Apprentice 2014 final
Arts and Entertainment
X Factor winner Ben Haenow has scored his first Christmas number one
music
News
i100
PROMOTED VIDEO
Have you tried new the Independent Digital Edition apps?
ebooks
ebooksA year of political gossip, levity and intrigue from the sharpest pen in Westminster
News
news
Arts and Entertainment
James May, Jeremy Clarkson and Richard Hammond in the Top Gear Patagonia Special
tv
News
File: James Woods attends the 52nd New York Film Festival at Walter Reade Theater on September 27, 2014
peopleActor was tweeting in wake of NYPD police shooting
News
Claudia Winkleman and co-host Tess Daly at the Strictly Come Dancing final
people
Extras
indybest
News
peopleLiam Williams posted photo of himself dressed as Wilfried Bony
Sport
Martin Skrtel heads in the dramatic equaliser
SPORTLiverpool vs Arsenal match report: Bandaged Martin Skrtel heads home in the 97th-minute
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs General

Recruitment Genius: Telesales & Customer Service Executives - Outbound & Inbound

£7 - £9 per hour: Recruitment Genius: Are you outgoing? Do you want to work in...

Recruitment Genius: National Account Manager / Key Account Sales

£30000 - £35000 per annum: Recruitment Genius: An opportunity has arisen for a...

Recruitment Genius: Operations Manager

£30000 - £35000 per annum: Recruitment Genius: An exciting opportunity to join...

Recruitment Genius: Recruitment Consultant

£30000 - £35000 per annum: Recruitment Genius: We have an excellent role for a...

Day In a Page

The week Hollywood got scared and had to grow up a bit

The week Hollywood got scared and had to grow up a bit

Sony suffered a chorus of disapproval after it withdrew 'The Interview', but it's not too late for it to take a stand, says Joan Smith
From Widow Twankey to Mother Goose, how do the men who play panto dames get themselves ready for the performance of a lifetime?

Panto dames: before and after

From Widow Twankey to Mother Goose, how do the men who play panto dames get themselves ready for the performance of a lifetime?
Thirties murder mystery novel is surprise runaway Christmas hit

Thirties murder mystery novel is surprise runaway Christmas hit

Booksellers say readers are turning away from dark modern thrillers and back to the golden age of crime writing
Anne-Marie Huby: 'Charities deserve the best,' says founder of JustGiving

Anne-Marie Huby: 'Charities deserve the best'

Ten million of us have used the JustGiving website to donate to good causes. Its co-founder says that being dynamic is as important as being kind
The botanist who hunts for giant trees at Kew Gardens

The man who hunts giants

A Kew Gardens botanist has found 25 new large tree species - and he's sure there are more out there
The 12 ways of Christmas: Spare a thought for those who will be working to keep others safe during the festive season

The 12 ways of Christmas

We speak to a dozen people who will be working to keep others safe, happy and healthy over the holidays
Birdwatching men have a lot in common with their feathered friends, new study shows

The male exhibits strange behaviour

A new study shows that birdwatching men have a lot in common with their feathered friends...
Diaries of Evelyn Waugh, Virginia Woolf and Noël Coward reveal how they coped with the December blues

Famous diaries: Christmas week in history

Noël Coward parties into the night, Alan Clark bemoans the cost of servants, Evelyn Waugh ponders his drinking…
From noble to narky, the fall of the open letter

From noble to narky, the fall of the open letter

The great tradition of St Paul and Zola reached its nadir with a hungry worker's rant to Russell Brand, says DJ Taylor
A Christmas ghost story by Alison Moore: A prodigal daughter has a breakthrough

A Christmas ghost story by Alison Moore

The story was published earlier this month in 'Poor Souls' Light: Seven Curious Tales'
Marian Keyes: The author on her pre-approved Christmas, true love's parking implications and living in the moment

Marian Keyes

The author on her pre-approved Christmas, true love's parking implications and living in the moment
Bill Granger recipes: Our chef creates an Italian-inspired fish feast for Christmas Eve

Bill Granger's Christmas Eve fish feast

Bill's Italian friends introduced him to the Roman Catholic custom of a lavish fish supper on Christmas Eve. Here, he gives the tradition his own spin…
Liverpool vs Arsenal: Brendan Rodgers is fighting for his reputation

Rodgers fights for his reputation

Liverpool manager tries to stay on his feet despite waves of criticism
Amir Khan: 'The Taliban can threaten me but I must speak out... innocent kids, killed over nothing. It’s sick in the mind'

Amir Khan attacks the Taliban

'They can threaten me but I must speak out... innocent kids, killed over nothing. It’s sick in the mind'
Michael Calvin: Sepp Blatter is my man of the year in sport. Bring on 2015, quick

Michael Calvin's Last Word

Sepp Blatter is my man of the year in sport. Bring on 2015, quick