People should not have brought house cats, Norway rats (Rattus norvegicus), and black rats (Rattus rattus) with them to Islands where they don't belong.

Eradication of both feral cats and the two rattus species results in a slow increase in the number of endangered birds.

Large Island Declared Rat-Free in Biggest Removal Success

South Georgia Island near Antarctica is now teeming with native wildlife, thanks to an effort to remove invasive rats that had been devouring birds.

https://news.nationalgeographic.com/...e-animals-spd/


An Evaluation of Feral Cat Management Options Using a Decision Analysis Network

https://www.ecologyandsociety.org/vol15/iss4/art10/

Efforts are needed to protect native species from feral cats

https://phys.org/news/2016-11-effort...cats.html#nRlv