Don't let that cute little face fool you...
It might look sweet and fluffy, but this mischief-maker photographed by Mercury reader John Brown is actually an American mink.
John was at Watermead Park taking shots when he saw its furry head pop out of a hole.
John, 65, of Rowlatt's Hill, Leicester, said: "At first I thought it was a stoat or a weasel but when I looked closely I saw it was something else. According to my book it's an American weasel and they're a bit of a pest.
"Some live in the wild after escaping from mink farms and they kill everything and take over.
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"I'd never seen one before but he caught my eye. I'm sure a lot of other people will be trying to get pictures of him now."
The American mink has long been a well-known pest at Rutland Water.
The animals have been imported since the 1920s for their fur but after escapes and deliberate releases soon became established in the wild.
They prey on freshwater fish, birds and the native water vole and have been blamed for a big decline in UK water voles.