Perhaps it has taken a shine to the window - or it thinks the person on the other side could be lunch.
Either way, the thousands of viewers who have watched this crafty fox on YouTube will have been grateful there was a computer screen between them and its sharp teeth.
The deceptively fluffy-looking predator has become an internet sensation after it was filmed licking an iced-up window.
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Fantastic Mr Fox: More than 219,000 viewers have watched as the fox stares cunningly at the camera and sticks out its long pink tongue
What big teeth you have: It may look fluffy, but its sharp fangs prove this new internet star is still a predator to be reckoned with
As one viewer punned: 'Firefox has encountered an unexpected problem with your version of windows'.
The fox seems to enjoy its starring role, eyeballing the camera and savouring each lick, looking as though it is sticking its tongue out for its audience.
More than 219,000 YouTube users have so far viewed the clip of the cheeky animal, called 'stupid fox' in Russian.
Stupid it may be, but with its long pink tongue and high-pitched yelping noises, no-one would want to be the other side of the glass.
