Sources on Invasive Species

Hi to all readers of this bog
Just came accross a good website on general Irish and invasive species
Its http://www.irelandswildlife.com/

The Mink in Ireland

Many Irish people view the mink as a pest. I have often wondered why this is the case.
Why is it that the mink can kill fowl and other game and still it has only come to people's attention in the past 10 or so years.
The oppinion of others is most welcome on this