When a fox is on the prowl, it takes a cool cat to see him off. (Photos)
Luckily Syoma the cat is one cool customer - living on the ice-locked fringes of Kamchatk, on the far eastern fringes tip of Russia.
So when this fox came to scout out the area, Syoma gave him no room - chasing him off the property without even blinking.
Syoma is described as ferocious - although, when he wants to be, he can be friendly enough.
When he was a kitten, he was nearly carried off by a bird of prey, and since then he has never offered a second chance to any animals that come to visit.
He spends his days keeping the mice away from his home - an entry point to the Kronotsky Nature Reserve.
But Sergei Krasnoschekov, who took these pictures, added that the cat is friendly enough to humans, once he gets to know them.
He said: 'I learned it from the first few seconds of our acquaintance. My attempt to pat the animal ended with him hissing, scratching and biting.
'Of course, he tolerated me after that - it was only for show.'
Even with the fox, there was not much maliciousness involved. Sergei said the cat and the fox were playing - but added it seemed a thin line between playing and fighting.
Sergei added: 'The fox in my opinion, is just teasing the cat, making him play and run.
'Yet both seem to be having fun, and this does not appear to be an all-out territorial battle.
Kronotsky Nature Reserve is one of the few places in Russia with active volcanoes and geysers, and - like Iceland - is sometimes called the Land of Fire and Ice.