Donald M. Jones / Red Fox (Vulpes vulpes) hunting vole in winter, Yellowstone National Park, Wyoming. Sequence 2 of 6

Donald M. Jones / Red Fox (Vulpes vulpes) hunting vole in winter, Yellowstone National Park, Wyoming. Sequence 1 of 6

Andy Trowbridge / Arctic fox (Alopex / Vulpes lagopus) stalking / hunting silhouetted against a colourful sky at sunset. Dovrefjell National Park, Norway, September.

Fabrice Cahez / Red fox (Vulpes vulpes) pouncing on prey, Vosges, France, September.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) hunting in fresh snow, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Erlend Haarberg / Arctic fox (Vulpes / Alopex lagopus) walking low over snow, blue morph, Iceland, April

Erlend Haarberg / Red fox (Vulpes vulpes) standing on hind legs with front paws on tree looking up it, Sor-Trondelag, Norway, June

Fabrice Cahez / Red fox (Vulpes vulpes) pouncing on prey, Vosges, France, September.

Fabrice Cahez / Red fox (Vulpes vulpes) pounding on prey, Vosges, France, September.

Roy Mangersnes / Arctic fox (Alopex / Vulpes lagopus) stalking, near Longyearbyen, Spitsbergen, Svalbard, Norway, August

Fabrice Cahez / Red fox (Vulpes vulpes) hunting vole in grass, tossing vole into the air, Vosges, France, June

Fabrice Cahez / Red fox (Vulpes vulpes) pouncing while hunting in field, Vosges, France, August