Polish Institute Classifies Domestic Cats as ‘Invasive Alien Species’

A Polish scientific institute has classified domestic cats as an “invasive alien species,” citing the harm they cause to birds and other wildlife.

Wojciech Solarz, a biologist at the state-run Polish Academy of Sciences, discovered that the harm cats cause in hunting and killing birds and other wildlife was sufficient reason to classify them as invasive.

Solarz described the growing scientific consensus that domestic cats have a harmful impact on biodiversity due to the number of birds and mammals they hunt and kill.

Solarz added the “Felis catus” species, also known as the house cat, to a national database powered by the Polish Academy of Sciences’ Institute of Nature Conservation, which holds 1,786 other species.

Solarz said the criteria for including the cat among alien invasive species are “100% met by the cat”. 

In an appearance on TVN, Solarz said that cats kill 140 million birds in Poland yearly.

The Polish Academy of Sciences emphasized its opposition to animal cruelty and said that cat owners should only limit the amount of time their pets spend outside during bird breeding season.


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