Conservationists were shocked after the "almost impossible" appearance of a grey squirrel on a Scots island which is home only to its native reds.
The rodent was spotted on the Isle of Seil in Argyll, around 100 miles from the nearest known grey squirrels.The species are classed as invasive due to the danger they pose to red squirrels.
Katie Berry, of Saving Scotland's Red Squirrels, described the sighting as "very unusual" and said the charity is uncertain as to how the animal appeared on Seil.She told the BBC: "The grey squirrel sighting on Seil is very unusual - it's in an area that is home to red squirrels only.
We simply can't say for certain how it arrived there."We're particularly interested in whether there is more than one grey squirrel in the area - at the moment, we only know of one.
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