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A respected Polish scientific institute has classified domestic cats as an invasive alien species, citing the damage they cause to birds and other wildlife. Some cat lovers have reacted emotionally to this month's decision. The institute stressed that all it was recommending was for cat owners to limit the time their pets spend outdoors during bird breeding season.

一个权威波兰科学机构将家猫列为外来入侵物种，理由是它们对鸟类和其他野生动物造成了损害。一些爱猫人士对这个月的决定作出了情绪化的反应。该研究所强调，它所建议的只是让猫主人在鸟类繁殖季节限制其宠物在户外活动的时间。