A Polish scientific institute has classified domestic cats as an "invasive alien species", citing the harm they cause to birds and other wildlife.
Some cat lovers have reacted emotionally to this determination by criticizing the institute's chief scientist.
Wojciech Solarz, a biologist at the Polish state Academy of Sciences, was not prepared for the public backlash when he entered "Felis catus", the scientific name for the common house cat, into a national database of 'alien species' run by Academy Institute for Nature Conservation.
The database already had 1,786 other species listed without any objections, Solarz told the AP on Tuesday. Noise on invasive alien species no. 1787, he said, may have come from some media reports that created the false impression that his institute was calling for the euthanasia of feral and other cats.
Solarz underscored the growing scientific consensus that domestic cats have a detrimental impact on biodiversity given the number of birds and mammals they hunt and kill.
The criteria for including cats among invasive alien species "are met 100% by the cat," he said.
Earlier this month, the Polish Academy institute published a post on its website citing the "controversy" and seeking to clarify its position. The institute emphasized that it was "against any cruelty to animals". It also argued that its classification was in line with European Union guidelines.