The trade in caged birds poses a risk to native species if the pets escape into the wild, UK researchers say. They identified almost 1,000 species of bird introduced into new areas by human activity ...

Alison Steadman tells the story of why and how so many birds that make up the avifauna of Britain are aliens from elsewhere The Canada Goose and Ruddy Duck Alison Steadman tells how the Canada Goose ...

An alien bird species has landed in large parts of northern Italy, putting local wildlife at risk. The African sacred ibis is an invasive species that is thought to have invaded after it escaped or ...

A 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 ...

The Guardian has published an article about the first case of alien bacteria dying from bird flu being recorded on Mars. Our verdict This is not a real article, and the Guardian confirmed it had never ...

Biodiversity is great in theory, but there are reasons to fend off invasive species and the knock-on effect of their presence Britain would be a wasteland if it weren’t for immigration. Fifteen ...