'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
PROMOTED VIDEO
Have you tried new the Independent Digital Edition apps?
News
ebooksNow available in paperback
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: Packaging Operatives

£7 - £8 per hour: Recruitment Genius: An opportunity has arisen for two indivi...

Ashdown Group: Trainee / Graduate Helpdesk Analyst

£20000 per annum: Ashdown Group: A highly reputable business is looking to rec...

Recruitment Genius: Estimator

£28000 per annum: Recruitment Genius: This company is a major supplier of buil...

Recruitment Genius: Software Developer

£28000 - £40000 per annum: Recruitment Genius: This is an exciting opportunity...

Day In a Page

Homeless Veterans appeal: 'You look for someone who's an inspiration and try to be like them'

Homeless Veterans appeal

In 2010, Sgt Gary Jamieson stepped on an IED in Afghanistan and lost his legs and an arm. He reveals what, and who, helped him to make a remarkable recovery
Could cannabis oil reverse the effects of cancer?

Could cannabis oil reverse effects of cancer?

As a film following six patients receiving the controversial treatment is released, Kate Hilpern uncovers a very slippery issue
The Interview movie review: You can't see Seth Rogen and James Franco's Kim Jong Un assassination film, but you can read about it here

The Interview movie review

You can't see Seth Rogen and James Franco's Kim Jong Un assassination film, but you can read about it here
Serial mania has propelled podcasts into the cultural mainstream

How podcasts became mainstream

People have consumed gripping armchair investigation Serial with a relish typically reserved for box-set binges
Jesus Christ has become an unlikely pin-up for hipster marketing companies

Jesus Christ has become an unlikely pin-up

Kevin Lee Light, aka "Jesus", is the newest client of creative agency Mother while rival agency Anomaly has launched Sexy Jesus, depicting the Messiah in a series of Athena-style poses
Rosetta space mission voted most important scientific breakthrough of 2014

A memorable year for science – if not for mice

The most important scientific breakthroughs of 2014
Christmas cocktails to make you merry: From eggnog to Brown Betty and Rum Bumpo

Christmas cocktails to make you merry

Mulled wine is an essential seasonal treat. But now drinkers are rediscovering other traditional festive tipples. Angela Clutton raises a glass to Christmas cocktails
5 best activity trackers

Fitness technology: 5 best activity trackers

Up the ante in your regimen and change the habits of a lifetime with this wearable tech
Paul Scholes column: It's a little-known fact, but I have played one of the seven dwarves

Paul Scholes column

It's a little-known fact, but I have played one of the seven dwarves
Fifa's travelling circus once again steals limelight from real stars

Fifa's travelling circus once again steals limelight from real stars

Club World Cup kicked into the long grass by the continued farce surrounding Blatter, Garcia, Russia and Qatar
Frank Warren column: 2014 – boxing is back and winning new fans

Frank Warren: Boxing is back and winning new fans

2014 proves it's now one of sport's biggest hitters again
Jeb Bush vs Hillary Clinton: The power dynamics of the two first families

Jeb Bush vs Hillary Clinton

Karen Tumulty explores the power dynamics of the two first families
Stockholm is rivalling Silicon Valley with a hotbed of technology start-ups

Stockholm is rivalling Silicon Valley

The Swedish capital is home to two of the most popular video games in the world, as well as thousands of technology start-ups worth hundreds of millions of pounds – and it's all happened since 2009
Did Japanese workers really get their symbols mixed up and display Santa on a crucifix?

Crucified Santa: Urban myth refuses to die

The story goes that Japanese store workers created a life-size effigy of a smiling "Father Kurisumasu" attached to a facsimile of Our Lord's final instrument of torture
Jennifer Saunders and Kate Moss join David Walliams on set for TV adaptation of The Boy in the Dress

The Boy in the Dress: On set with the stars

Walliams' story about a boy who goes to school in a dress will be shown this Christmas