Journalists Need To Stop Citing The Bunk Studies Blaming Cats For Annihilating Wildlife

Free-ranging cats do have a negative impact on wildlife, but we’re not going to solve the problem by demonizing them and culling them by the millions.

The Literary Hub story starts off with a provocative question: what if cats ruled the world?

This is a question I find amusing to ponder, so instantly my mind was filled with images of cats scandalizing foreign heads of state by insouciantly swiping gifts off tables, angering diplomats by yawning and nodding off during summits, and financing the construction of massive and unnecessary coastal walls, on the off chance the ocean decides to move inland and get them wet.

Then the writer cited the repeatedly-debunked “study” that credulous media of all stripes still reference without bothering to read the text — that infamous 2013 Nature Communications paper, published by birders who author books with titles like “Cat Wars: The Consequences Of A Cuddly Killer.”

Some journalists don’t know any better, some are overworked, and some are frankly too lazy to read the study with a critical eye, but I think one of the more likely reasons people continue to cite the paper is because it’s easier to blame felinekind for wildlife extirpation than it is to admit we’re the primary culprits. After all, according to the WWF’s most recent annual review, we’ve killed off 73 percent of Earth’s wildlife since 1970, and we certainly didn’t need house cats to help us push elephants, rhinos, every species of higher non-human primate, and innumerable other species to the brink of extinction.

We did that. We did it with our relentless development, consuming and fracturing wild habitats. We did it with careless industrialization, by dumping chemicals and garbage into our rivers and lakes until more than half of them were rendered too polluted to swim in or drink from. We did it by bulldozing old growth forest and jungle, by exploiting species for fur, folk medicine, ivory, sport hunting and in the illegal wildlife trade.

Cheetahs are critically endangered, and they’re being driven to extinction even faster by poachers, who sell them to wealthy buyers in oil-rich gulf states where they’re trendy pets. Credit: Riccardo Parretti/Pexels

More than 47,000 species — that we know of — are headed toward extinction. It’s so much easier to blame it on anyone or anything else than admit we need to make major changes to our lifestyles and policies.

But don’t take my word for it. Here’s what Alley Cat Allies has to say about the 2013 meta-analysis and its derivative papers:

The Smithsonian-funded study published in Nature Communications is not rigorous science.
It is a literature review that surveys a variety of unrelated, older studies and concocts a highly speculative conclusion that suits the researchers’ seemingly desperate anti-cat agenda. This speculative research is highly dangerous. It is being used by opponents of outdoor cats and Trap-Neuter-Return (including the authors) to further an agenda to kill more cats and roll back decades of progress on TNR. And it is being spread unchecked by the media.

Here’s what a group of ethicists and anthropologists wrote about the claims against cats in the journal Conservation Biology, lamenting the lack of nuance and danger in arguing that cats must be stopped “by any means necessary.” The drive to blame felines, they argue, has “fueled an unwarranted moral panic over cats”:

“Contrary to Loss and Marra’s claims that the scientific consensus is consistent with their views that cats are a global threat to biodiversity, the actual scientific consensus is that cats can, in certain contexts, have suppressive population-level effects on some other species (Twardek et al. 2017). This is something that is true of all predators, native or not (Wallach et al. 2010). Thus, cats should not be profiled as a general threat a priori and without reference to important factors of ecological context, situational factors, clear definition of harms, and evidence thereof.”

“There are there are serious reasons to suspect the reliability of the new, extreme cat-killer statistics,” wrote Barbara J. King, retired chairwoman of the department of anthropology at The College of William and Mary.

Feline predatory impact varies by local conditions. Free-ranging cats in cities and suburbs kill rodents, but have minimal impact on other animals, data shows. Credit: Patricia Luquet/Pexels

Like we’ve often noted here on PITB, the authors of the Nature Communications study can’t even say how many free-ranging felines exist in the US. They say it’s between 20 and 120 million. That’s a 100 million difference in the potential cat population! How can they tell us how many birds and mammals are killed by cats if they can’t even tell us how many cats there are? No amount of massaging the numbers can provide an accurate picture if the initial data is shaky or nonexistent.

Furthermore, the nature of a meta-analysis means the authors depend on earlier studies for estimates on predatory impact, but the 2013 Nature Communications paper does not include any data —not a single study — on feline predatory impact. In other words, they have no idea how many animals free-ranging cats actually kill.

In authentic studies that actually do measure predatory impact, the data varies widely in geographic and demographic context. Data derived from the D.C. Cat Count, for example, shows that cats living more than 800 feet from forested areas rarely kill wildlife, and are much more likely to kill rodents.

Those who cite the bunk study and its derivatives are “demonizing cats with shaky statistics,” King wrote, adding she was alarmed by “an unsettling degree of uncertainty in the study’s key numbers.”

Free-roaming populations are reduced when cat colonies are managed, and the animals are fed and fixed. Credit: Mia X/Pexels

Ultimately, we agree with Wayne Pacelle, former president of the Humane Society of the United States.

The meta-analysis authors “have thrown out a provocative number for cat predation totals, and their piece has been published in a highly credible publication, but they admit the study has many deficiencies. We don’t quarrel with the conclusion that the impact is big, but the numbers are informed guesswork.”

Cats do have a negative impact on wildlife, it varies according to local circumstances, and those of us who love cats have a responsibility to keep our pets indoors and help manage free-ranging populations.

But cooler heads must prevail, approaches to managing cats must be evidence-based, and the effort requires people of all kinds working together — which becomes much more difficult when agenda-driven pseudoacademics whip people into a frenzy by portraying felines as bloodthirsty, invasive monsters who need to be wiped out “by any means necessary.”

When that kind of rhetoric drives public policy, you get countries like Australia killing two million cats by air-dropping poisoned sausages, vigilantes gunning down cats with shotguns in public parks, and local governments offering cash prizes to children who shoot the most cats and kittens. Those efforts aren’t just cruel and inhuman, there’s not a shred of proof that they do a damn thing to help other species.

Solving the problem of free-ranging cats requires us to own up to our own role in species extinction and to take measured, evidence-based steps to protect vulnerable wildlife. Otherwise, we’re inflicting a whole lot of suffering on sentient creatures and accomplishing absolutely nothing.

The Most Important Cat Study Ever Has Been Completed, And The Results Are In

For the first time ever, a US city has conducted a true cat census using scientifically proven methods, including doing it the hard way — by counting. The project’s authors hope other cities follow their lead.

The last decade has seen something of a renaissance in cat-related research, with insightful studies about feline behavior coming from researchers in the US and Japan.

On the other hand there’s been a glut of research into feline predatory impact and public policy, and the majority of those studies have been deeply flawed. They’re based on suspect data and tainted by the interests of people who are more interested in blaming cats for killing birds than they are in learning about the real impact of domestic felines on local wildlife.

Those studies have all taken extreme shortcuts — using data that was collected for entirely different studies, for example, or handing out questionnaires that at best lead to highly subjective and speculative “data” on how cats affect the environment.

Several widely-cited studies that put the blame on cats for the extirpation of bird species have relied on wild guesses about the cat population in the US, estimating there are between 20 million and 120 million free-roaming domestic cats in the country. If you’re wondering how scientists can offer meaningful conclusions about the impact of cats when even they admit they could be off by 100 million, you’re not alone.

No one had ever actually counted the number of cats in a location, much less come close to a real figure — until now.

When leaders in Washington, D.C., set out to tackle the feral cat problem in their city, they knew they couldn’t effectively deal with the problem unless they knew its scope. They turned to the University of Maryland for help, which led to the D.C. Cat Count, a three-year undertaking to get an accurate census with the help of interested groups like the Humane Society and the Smithsonian.

DC Cat Count
An image from one of 1,530 motion-activated cameras deployed for the D.C. Cat Count. Credit: D.C. Cat Count

The researchers approached each of their local shelters and rescues for data, then assembled a meticulous household survey to get a handle on how many pet cats live in the city, and how many have access to the outdoors.

Finally — and most critically — they used 1,530 motion-activated cameras, which took a combined 6 million photos in parks, alleys, public spaces, streets and outdoor areas of private residences. They also developed methods for filtering out multiple images of individual cats, as well as other wildlife. And to supplement the data, team members patrolled 337 miles of paths and roads in a “transect count” to verify camera-derived data and collect additional information, like changes in the way local cats move through neighborhoods.

DC Cat Count
A cat who looks a lot like the Budster was captured in this 2019 photo from a motion-activated camera with night vision. Credit: DC Cat Count

Now that all the data’s been collected and analyzed, the D.C. Cat Count finally has a figure: There are about 200,000 cats in the city, according to the study.

Of those, 98.5 percent — or some 197,000 kitties — are either pets or are under some form of human care and protection, whether they’re just fed by people or they’re given food, outdoor shelter and TNR.

“Some people may look at our estimate and say, oh, well, you know, you’re not 100% certain that it’s exactly 200,000 cats,” Tyler Flockhart, a population ecologist who worked on the count, told DCist. “But what we can say is that we are very confident that the number of cats is about 200,000 in Washington, D.C.”

The study represents the most complete and accurate census of the local cat population in any US city to date, and the team behind it is sharing its methods so other cities can conduct their own accurate counts. (They’ll also need money: While the D.C. Cat Count relied on help from volunteers and local non-profits it was still a huge project involving a large team of pros, and it cost the city $1.5 million.)

By doing things the hard way — and the right way — D.C. is also the first American city to make truly informed choices on how to manage its feline population. No matter what happens from here, one thing’s certain — the city’s leaders will be guided by accurate data and not creating policy based on ignorance and hysteria painting cats as furry little boogeymen.

DC Cat Count
Not all the photos captured images of cats, and not all the felines were little: In this 2019 night image, a bobcat wanders in front of a trail camera. Credit: DC Cat Count