What’s the Affect of Cats on Native Wildlife? The Shocking Reply!

cat hunting bird

Do you know that cats have contributed to the extinction of over 60 species of untamed birds, mammals, and reptiles?1 Sadly, it’s true, and it appears they proceed to adversely affect a variety of species. In truth, cats are listed as one of many 100 worst invasive alien species on the earth.2

I can’t blame them; cats are obligate carnivores and pure hunters. They want animal protein to outlive, and chasing after and killing their very own prey is a enjoyable and fulfilling pastime. However, what ecological affect are cats having on our world’s biodiversity? Maintain studying as I inform you concerning the stunning affect cats have on the wildlife of the world.

Cats & Wildlife: The Stunning Numbers

One incontrovertible fact that shocked me was that cats can kill two to 10 instances extra wildlife than different predators of an identical dimension. They hunt in areas that encompass their properties (inside a 100-meter radius), making the impact on wildlife extremely concentrated.

Since pet cats are fed cat meals by their people, they kill fewer prey every day than different wild predators. As a result of their residence ranges are small as compared, although, the impact on native wildlife may be very concentrated. When you think about how densely populated pet cats might be in some areas, you may see how the danger to birds and mammals might be even worse.

Whereas the principle affect of cats is thru direct predation, they will additionally carry and unfold ailments that may have an effect on people and wildlife. For instance, sure ailments may cause livestock to abort their fetuses or trigger scar tissue in livestock meat, successfully decreasing farmers’ productiveness and revenue.

Let’s take a better have a look at how the home and feral cat populations have an effect on wildlife in a number of areas of the world.

cat hunting in the bushes outside
Picture credit score: Doug Kelley, Unsplash

United States

It’s estimated that cats kill as much as 4 billion birds and over 22 billion mammals yearly in america. Mammals like mice, voles, rabbits, and shrews are probably to be preyed upon.

Feral cats are particularly impactful in island ecosystems similar to Hawaii. They’ve sturdy populations on all eight of the principle islands and are behind widespread ecological disruptions which have threatened and proceed to threaten the native wildlife. Apart from appearing as predators, the introduction of cats on the islands has unfold the doubtless deadly parasite Toxoplasma gondii. This parasite is answerable for contaminating water and marine environments, negatively impacting birds and mammals like monk seals.


Cats are the primary killer of birds in Canada, killing between 100 and 350 million birds yearly. Canada’s wild chicken populations have been dropping off for the final 40 years, with some species’ populations reducing by over 95%. Cat predation provides vital stress to those declining populations which might be already dealing with severe challenges like habitat loss and pesticides.


Cats are thought-about an invasive species in Australia and have prompted extra environmental harm there than on another continent. Cats usually are not native to the realm and had been solely launched within the early 1800s, and since they’re nonetheless comparatively new to the island, the native Australian animals by no means had an opportunity to co-evolve with them.

Home and feral cats within the nation kill over one billion mammals, 399 million birds, 609 million reptiles, and 92 million frogs, making them considered one of Australia’s most ecologically damaging and costly invasive species.

Australia’s feral cats have straight contributed to the extinction of over 20 native Australian mammals, such because the rusty numbat and the desert bandicoot.

cat hunting in the wild
Picture Credit score: henrikveres, Pixabay


China’s home cat inhabitants is within the midst of a boom on the time of writing, rising over 10% from 48 million to 58 million between 2020 and 2021. However, the nation’s populations of feral cats are additionally on the rise, with as much as 5 million in Beijing alone. Research from 2021 means that these stray cats are answerable for killing billions of invertebrates, fishes, amphibians, reptiles, birds, and mammals.


Islands are residence to many “ecologically naïve” animal species. This refers back to the tendency of animals on remoted islands to lose their wariness of potential predators. They don’t have a response when face-to-face with bigger predators, like cats. When feral cats are launched to those islands, they will have a devastating impact on biodiversity.

Cats have been implicated within the native extinction of species such because the Lyall’s wren in New Zealand or the cavy-like hutia within the Caribbean islands.

Stray vs Family Cats

Over 25% of households in america have a minimum of one pet cat. Whereas 75% of those pet cats are stored strictly indoors, the opposite quarter is left free to roam outdoors. Hybrid indoor-outdoor cats are answerable for killing two animals weekly, however you is likely to be shocked to study that these hybrids usually are not the first situation.

Estimates counsel that there are anyplace between 60 and 100 million homeless cats in America. Whereas the typical family cat in your neighborhood could also be answerable for a few of the deaths of your native wildlife, the stray cats are doubtless answerable for the majority of them. According to data, stray and feral cats are answerable for 69% of chicken deaths and 89% of mammal deaths in America.

The issue with stray cats is that they’re usually “sponsored” by people. As a substitute of bringing the strays into their properties, people present them with meals and help that permit them to proceed to breed at unnatural charges. In consequence, they stay in the identical space for his or her total lives, continually killing and never giving the inhabitants of native wildlife time to rebound as they’d in a pure predator-prey cycle.

stray cats in the streets
Picture Credit score: Lea Rae, Shutterstock

How Can I Do My Half in Defending Native Wildlife?

The reply to defending your native wildlife is to maintain your cats indoors. Your pet can not hurt your neighborhood’s birds or mammals if it’s protected inside your house all day.

After all, your kitty might need one thing to say about your choice to maintain them indoors, particularly if they’re used to having free roam of their neighborhood. This can be a course of that’s going to take a while, so persistence is a advantage right here. Your purpose is to make your house as pleasing as potential with loads of toys, enrichment, and methods to your cat to flex its searching muscle tissue. Feed them utilizing meals puzzles and put money into toys that mimic the motion of birds or mice if you play with them.

In case your cat continues to be begging at your door to go outdoors, take into account constructing them a catio. Catios are the right transition for cat house owners seeking to transition their out of doors cat to indoor life as they supply the stimulation of the outside whereas making certain any native wildlife is out of attain.

You may also purchase a leash and collar to your cat so you may take them for walks to permit them to benefit from the outdoor safely.

Last Ideas

Nobody desires to think about their beloved kitties as wild animal killing machines, however given an opportunity, your in any other case candy and docile cat may discover pleasure and revel within the struggling of your native wildlife inhabitants. You are able to do your half in defending the wildlife in your space by conserving your cat indoors or permitting them to discover outdoors safely whereas in a catio or on a leash.

Featured Picture Credit score: Kuttelvaserova Stuchelova, Shutterstock