American mink tries to colonise Anglesey
The American mink, which escaped into the wild after it was introduced to Britain for its fur, is trying to colonise Anglesey.
It can decimate native water voles and attack seabird colonies.
Until now the island has been relatively mink-free, but the discovery of a female well inland has set alarm bells ringing.
They were introduced in 1929 and in the rest of the UK there are thought to be 37,000 American mink roaming wild.
Aled Hughes reports.