Ruqayyah Snyder
Cats and dogs are beloved companions in many Australian households. However, concerns about the impact of these pets on native wildlife populations have shaped pet control legislation. Cats, in particular, have been deemed invasive and are considered one of the most damaging invasive species worldwide. In Australia, feral cats have wiped out more than a dozen species and pushed others to the brink of extinction. Roaming pet cats in Australia are also responsible for the deaths of millions of animals annually, including native species. While there is less research on the impact of dogs, prospective studies are needed to evaluate the effects of dogs and cats on wildlife numbers and diversity in urban areas.
| Characteristics | Values |
|---|---|
| Animals that kill dogs and cats | Feral cats, other cats, dogs |
| Animals killed by cats in Australia | 390 million per year, including 110 native animals (40 reptiles, 38 birds, 32 mammals) |
| Animals killed by feral cats in Australia | 2 billion per year, including mammals, birds, frogs, invertebrates |
| Animals killed by dogs in Australia | 2 mammals, 2 birds, 2 reptiles, 3 amphibians |
| Cats in Australia | 3.3 million |
| Dogs in Australia | 4.2 million |
| Cats that kill native Australian animals | 83 million reptiles, 80 million birds |
| Cats that kill introduced animals | Birds, mammals, especially rabbits and house mice |
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What You'll Learn
Cats kill billions of native Australian animals
Cats are a significant threat to native Australian animals, with billions killed by felines every year. The impact of cats on Australia's wildlife has been described as a crisis, with cats playing a leading role in most of Australia's 34 mammal extinctions since 1788.
Feral cats are a well-known problem, with these wild cats collectively killing more than three billion animals per year across Australia. Feral cats are estimated to kill 1.4 billion native Australian animals annually, with each individual feral cat killing 390 mammals, 225 reptiles, and 130 birds per year.
However, pet cats also wreak havoc on native wildlife. Roaming pet cats kill 390 million animals per year in Australia, including reptiles, birds, and mammals. On average, each roaming pet cat kills 186 animals, mostly native species, per year. This means that pet cats in Australia collectively kill between 4,440 and 8,100 animals per square kilometre per year.
The impact of pet cats on native wildlife is particularly concerning because of their high urban density. Per square kilometre per year, pet cats kill 30-50 times more animals than feral cats in the bush. This level of predation is threatening the survival of many native species, especially those with low reproductive rates.
To reduce the impact of pet cats on native wildlife, some have recommended keeping pet cats contained 24/7. This could include implementing night-time curfews, which would benefit native nocturnal mammals. However, such measures have faced opposition from animal welfare organizations, and more research is needed to fully understand the impact of cats on native wildlife populations.
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Feral cats have wiped out over a dozen native species
Cats, both feral and domestic, have had a devastating impact on native wildlife in Australia. Cats have contributed to the extinction of over 30 native species since the country's colonisation, and continue to threaten at least another 123 nationally threatened species. Feral cats alone have contributed to the extinction of more than 20 Australian mammal species, including the pig-footed bandicoots, lesser bilby, and broad-faced potoroo. They are also a major cause of the decline in many other land-based threatened species, such as the bilby, bandicoot, bettong, and numbat.
Feral cats are an introduced predator in Australia, and their presence has been an environmental disaster. They kill over 1.5 billion native mammals, birds, reptiles, and frogs, and 1.1 billion invertebrates each year. This amounts to 2.92 million mammals, 1.67 million reptiles, 1.09 million birds, 0.26 million frogs, and 2.97 million invertebrates every 24 hours. Feral cats also carry infectious diseases that can be transmitted to native animals, domestic livestock, and even humans.
Domestic cats also contribute to the problem. Roaming pet cats collectively kill 390 million animals per year in Australia, including reptiles, birds, and mammals. This averages out to 186 animals per roaming cat each year, most of which are native species. In fact, pet cats kill 30-50 times more animals per square kilometre per year than feral cats, due to their high urban density.
The impact of cats on native wildlife has led to concerns about the future of many species. Predation by cats is listed as a key threatening process under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). This has resulted in the development of threat abatement plans to ensure the long-term survival of native species. The Australian government provides funding for projects aimed at managing the threat posed by feral cats and recovering threatened species.
To address the issue, the Australian government has implemented various measures, such as poison baits specifically designed for feral cats. These baits contain a humane toxin and are designed to minimise the risk of native animals being poisoned. Additionally, there are efforts to keep domestic cats contained and prevent them from roaming and hunting. It is recommended that cat owners keep their pets indoors to protect wildlife, especially in areas with nature, as cats living near these areas tend to hunt more.
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Cats have contributed to extinctions of native wildlife
Cats have been a leading cause of mammal extinctions in Australia. They have contributed to most of the country's 34 mammal extinctions since 1788, and are a significant factor in the declining populations of at least 123 other threatened native species. Feral cats in Australia eat about 2 billion reptiles, birds, frogs, and mammals each year, and over a billion invertebrates.
Feral and roaming cats have contributed to the extinction of 27 native animal species, including a long-forgotten mainland parrot. Cats have also been the primary drivers of the extinction of the paradise parrot, native marsupials like two species of pig-footed bandicoots, the lesser bilby, the Nullarbor dwarf bettong, the desert rat-kangaroo, and more. In addition, cats have played a role in the disappearance of species from islands, such as the western barred bandicoot and Shark Bay mouse from Faure Island in Shark Bay.
The impact of cats on Australian wildlife is more severe than on any other continent. This is likely due to several factors. Firstly, Australian animals have evolved without cat-like predators, making them more vulnerable to cats' hunting strategies. Secondly, many Australian animals have low reproductive rates, making it difficult for them to recover from predation. Lastly, cats are highly adaptable hunters, allowing them to thrive in various Australian environments.
The high density of pet cats in urban areas also contributes to the problem. On average, each roaming pet cat kills 186 reptiles, birds, and mammals per year, most of which are native species. In total, pet cats kill 390 million animals per year in Australia. This has led to the decline and extinction of some native animal species in their area, including a feather-tailed glider population in southeastern NSW, a skink population in a Perth suburb, and an olive legless lizard population in Canberra.
To protect native wildlife, responsible pet ownership is crucial. Keeping cats indoors, especially at night, can significantly reduce their impact on native animal populations.
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Cats and dogs can transmit diseases to native wildlife
Cats and dogs can transmit diseases such as toxoplasmosis, cat roundworm, and cat scratch disease, which can be passed on to humans and wildlife. For example, toxoplasmosis is caused by the parasite Toxoplasma gondii, which is found in cat faeces and can survive for months in the environment. Humans can become infected by ingesting contaminated soil, dust, or undercooked meat from animals that have come into contact with cat faeces. Cat scratch disease, caused by the bacterium Bartonella henselae, can be transmitted to humans and other animals through bites or scratches from an infected cat.
The impact of cats and dogs on native wildlife in Australia is a concern for conservationists. While some argue that domestic cats and dogs primarily hunt common species, their predation can still negatively affect overall wildlife populations. The introduction of non-native species, such as dogs and cats, into new regions can alter ecosystem dynamics through increased competition for resources and predation of native species.
To protect Australia's native wildlife, it is essential to understand the role of cats and dogs in urban ecosystems. This knowledge can inform management strategies and direct resources to effectively protect native species. Responsible pet ownership is crucial, including keeping cats indoors, improving waste management, and preventing access to potential food sources for feral cats.
While the focus has primarily been on the impact of cats, dogs also contribute to the issue. Studies have shown that dogs catch a median of 2 mammals, 2 birds, 2 reptiles, and 3 amphibians, with a substantial proportion being native animals (62%). Dogs have been recorded catching larger native prey, such as possums, kangaroos, and wallabies.
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Pet control legislation has been shaped by concerns about cats and dogs
Pet control legislation in Australia has been shaped by concerns about the impact of cats and dogs, particularly on native wildlife populations. Cats and dogs are typically classified as companion animals, which generally receive the strongest level of protection under state laws. However, in Australia, concerns about the impact of roaming pets on native wildlife have prompted legislative action.
Cats, in particular, have been the focus of legislation due to their high predation rates. Roaming pet cats in Australia kill an estimated 390 million animals per year, including reptiles, birds, and mammals, with an average of 186 animals killed by each cat annually. This has led to declines and extinctions of some native species. As a result, some Australian suburbs have banned cats, while others require cats to be confined to their owner's property.
Dogs are also subject to pet control legislation in Australia, with laws requiring them to be confined to their owner's property. However, the impact of dogs on native wildlife has been less studied, and there is scant research on the impact of both cats and dogs in urban areas. One study found that dogs caught a median of 2 mammals, 2 birds, 2 reptiles, and 3 amphibians, while cats caught a median of 3 mammals, 2 birds, 4 reptiles, and 2 amphibians over a 6-month period.
While most animal protection legislation occurs at the state level, cities and counties also play a crucial role in enacting and enforcing local animal protection measures. For example, hundreds of cities and counties have implemented retail pet sale bans, anti-tethering laws, and wild animal performance bans. These local laws not only protect animals in the area but also pave the way for more expansive protections at the state level.
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Frequently asked questions
Cats have contributed to the extinction of several native Australian species. Feral cats alone kill 2 billion animals in Australia annually, including 1.9 million reptiles, 1.2 million birds, 3.2 million mammals, 3 million invertebrates and 0.25 million frogs. Cats have also played a leading role in Australia's 34 mammal extinctions since 1788, and are a big reason populations of at least 123 other threatened native species are dropping.
Dogs have also been known to prey on native wildlife in Australia. A questionnaire found that of the pets observed to catch prey, dogs caught a median of 2 mammals, 2 birds, 2 reptiles, and 3 amphibians. 62% of the mammals caught by dogs were native species.
The Australian government has proposed killing feral cats to address the issue. However, this has been met with opposition from animal welfare organizations.
Cat owners can keep their cats indoors, especially at night when native animals are most active. Owners can also provide their cats with adequate food and shelter to reduce the likelihood of hunting.
Dog owners can also keep their dogs indoors and provide them with adequate food and shelter. Dogs must also be confined to their owner's property, as per Australian law.
