'Stone-cold serial killers': Domestic cats slaughter billions upon billions of animals in US every year

A new study has discovered cat kills exceed all prior estimates

They’re cuddly, adorable and the most reliably popular thing on the internet, but it turns out cats are also stone-cold serial killers.

A new study published by the journal Nature Communications has found that domestic cats slaughter billions of birds and small mammals in the US every year.

Scientists from the Smithsonian Conservation Biology Institute and the US Fish and Wildlife Service compiled nationwide data from a number of local surveys and pilot studies, to conclude that cats are responsible for the deaths of up to 3.7bn birds and 20.7bn small mammals every 12 months, including mice, voles, rabbits and shrews.

“The magnitude of wildlife mortality caused by cats that we report here far exceeds all prior estimates,” the study, which set out to estimate the number of animals killed as the result of human activity, concluded.

It positioned felines as the probable top human-linked threat to wildlife in North America. More birds and mammals die at the paws of cats than are killed by cars, chemicals or collisions with man-made structures.

The researchers estimated that US cat-owners account for around 84 million cats, which each kill between four and 18 birds per year, and between eight and 21 small mammals. However, the death counts racked up by domestic cats pales in comparison with that of feral cats, which the report suggests slay up to 46 birds and 338 small mammals each, annually. There are thought to be 30-80million such cats living wild in the US.

During an August 2012 study by the University of Georgia, researchers attached miniature video cameras to 60 cats to monitor their daily routines; they found that the felines typically spent one third of every day killing small animals. One of the new report’s authors, Dr Peter Marra of the Smithsonian Conservation Biology Institute, told NPR that he and his colleagues were stunned by the scale of the slaughter. Cats hunting, he said, “could be causing some wildlife populations to decline in some areas.”

The study recommends “conservation and policy intervention” in order to reduce the environmental impact of the bloodthirsty pets. Animal welfare groups advocate so-called trap-neuter-return (TNR) programmes: instead of being euthanized, feral cats are vaccinated, neutered and returned to the streets unable to reproduce. But conservationists claim this can exacerbate the problem by encouraging cat-owners to abandon unwanted cats to the growing number of outdoor cat colonies. The study found that TNR programmes are “potentially harmful to wildlife populations” because they leave so many murderous felines in the wild.

New Zealand economist and environmentalist Gareth Morgan has proposed more drastic measures. On his website garethsworld.com/catstogo, Mr Morgan claims, “That little ball of fluff you own is a natural born killer.” He urges cat owners to neuter their pets and resist the temptation to add any more to their households. He has also called on his fellow New Zealanders to set cat traps across the country to catch stray felines so they can be put down.

Start your day with The Independent, sign up for daily news emails
Life and Style
Steve Shaw shows Kate how to get wet behind the ears and how to align her neck
healthSteven Shaw - the 'Buddha of Breaststroke' - applies Alexander Technique to the watery sport
News
A poster by Durham Constabulary
news
Sport
Cameron Jerome
footballCanaries beat Boro to gain promotion to the Premier League
Arts and Entertainment
Performers drink tea at the Glastonbury festival in 2010
music
Have you tried new the Independent Digital Edition apps?
News
ebookA unique anthology of reporting and analysis of a crucial period of history
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

Guru Careers: Software Developer / C# Developer

£40-50K: Guru Careers: We are seeking an experienced Software / C# Developer w...

Guru Careers: Software Developer

£35 - 40k + Benefits: Guru Careers: We are seeking a Software Developer (JavaS...

SThree: Trainee Recruitment Consultant / Resourcer

£18000 - £23000 per annum + Commission: SThree: As a Trainee Recruitment Consu...

Ashdown Group: UI Developer - (UI, HTML, CSS, JavaScript, AngularJS)

£25000 - £40000 per annum: Ashdown Group: UI Developer - (UI, JavaScript, HTML...

Day In a Page

Abuse - and the hell that came afterwards

Abuse - and the hell that follows

James Rhodes on the extraordinary legal battle to publish his memoir
Why we need a 'tranquility map' of England, according to campaigners

It's oh so quiet!

The case for a 'tranquility map' of England
'Timeless fashion': It may be a paradox, but the industry loves it

'Timeless fashion'

It may be a paradox, but the industry loves it
If the West needs a bridge to the 'moderates' inside Isis, maybe we could have done with Osama bin Laden staying alive after all

Could have done with Osama bin Laden staying alive?

Robert Fisk on the Fountainheads of World Evil in 2011 - and 2015
New exhibition celebrates the evolution of swimwear

Evolution of swimwear

From bathing dresses in the twenties to modern bikinis
Sun, sex and an anthropological study: One British academic's summer of hell in Magaluf

Sun, sex and an anthropological study

One academic’s summer of hell in Magaluf
From Shakespeare to Rising Damp... to Vicious

Frances de la Tour's 50-year triumph

'Rising Damp' brought De la Tour such recognition that she could be forgiven if she'd never been able to move on. But at 70, she continues to flourish - and to beguile
'That Whitsun, I was late getting away...'

Ian McMillan on the Whitsun Weddings

This weekend is Whitsun, and while the festival may no longer resonate, Larkin's best-loved poem, lives on - along with the train journey at the heart of it
Kathryn Williams explores the works and influences of Sylvia Plath in a new light

Songs from the bell jar

Kathryn Williams explores the works and influences of Sylvia Plath
How one man's day in high heels showed him that Cannes must change its 'no flats' policy

One man's day in high heels

...showed him that Cannes must change its 'flats' policy
Is a quiet crusade to reform executive pay bearing fruit?

Is a quiet crusade to reform executive pay bearing fruit?

Dominic Rossi of Fidelity says his pressure on business to control rewards is working. But why aren’t other fund managers helping?
The King David Hotel gives precious work to Palestinians - unless peace talks are on

King David Hotel: Palestinians not included

The King David is special to Jerusalem. Nick Kochan checked in and discovered it has some special arrangements, too
More people moving from Australia to New Zealand than in the other direction for first time in 24 years

End of the Aussie brain drain

More people moving from Australia to New Zealand than in the other direction for first time in 24 years
Meditation is touted as a cure for mental instability but can it actually be bad for you?

Can meditation be bad for you?

Researching a mass murder, Dr Miguel Farias discovered that, far from bringing inner peace, meditation can leave devotees in pieces
Eurovision 2015: Australians will be cheering on their first-ever entrant this Saturday

Australia's first-ever Eurovision entrant

Australia, a nation of kitsch-worshippers, has always loved the Eurovision Song Contest. Maggie Alderson says it'll fit in fine