The American Mink was introduced to Scotland as part of fur farming enterprises in the 1950s. Some of them escaped and have become feral. However, a Scottish Natural Heritage eradication programme has been successful, leading to birds returning to their breeding grounds, particularly in the Outer Hebrides, now safe of a relentless predator. See the MailOnline.
Scottish Islands Explorer - has been evident in Scotland for a far shorter time
Digital Edition: now has quite a presence in America