Jussi Murtosaari / Wolverine (Gulo gulo) in forest, northern Finland, June.

Edwin Giesbers / Female Wolverine (Gudo gudo) in snow covered landscape, captive, Norway, February.

Edwin Giesbers / Female Wolverine (Gudo gudo) standing up in snow, captive, Norway, February.

Edwin Giesbers / Female Wolverine (Gudo gudo) in snow, captive, Norway, February.

Danny Green / Wolverine (Gulo gulo) in the snow, Lieksa, Finland, March.

Danny Green / Wolverine (Gulo gulo) climbing a tree with snow on its nose, Lieksa, Finland, March.

Jussi Murtosaari / Wolverine (Gulo gulo) looking around from a tussock of heather, Finland, June

Jussi Murtosaari / Wolverine (Gulo gulo) walking in grassland, Finland, June

Igor Shpilenok / Parallel tracks of a person and a Wolverine (Gulo gulo); the Wolverine is adapted to easily walk over snow. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverine (Gulo gulo) climbing tree. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Wolverine (Gulo gulo) looking into window of ranger station. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverine (Gulo gulo) in rain. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, May.

Igor Shpilenok / Wolverine (Gulo gulo) climbing tree. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Wolverine (Gulo gulo) sitting under tree. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverine (Gulo gulo) portrait at dusk. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Wolverine (Gulo gulo) by riverbank. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Wolverine (Gulo gulo) portrait. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverines (Gulo gulo) in the open snow-covered tundra. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Wolverine (Gulo gulo) at dusk on snow. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Wolverine (Gulo gulo) portrait at night. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, December.

Igor Shpilenok / Wolverine (Gulo gulo) portrait. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverine (Gulo gulo) portrait. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverine (Gulo gulo) feet in snow den hole, where it hibernates over winter. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, January.

Igor Shpilenok / Wolverine (Gulo gulo) sitting in snow. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverines (Gulo gulo) meeting, in dominant and submissive postures. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Igor Shpilenok / Wolverine (Gulo gulo) emerging from snow shelter after hibernation. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, February.

Igor Shpilenok / Wolverine (Gulo gulo) defending territory from Red Fox (Vulpes vulpes). Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, March.

Danny Green / Wolverine (Gulo gulo) climbing tree. Finland, July.

Danny Green / Wolverine (Gulo gulo) in woodland. Finland, July.

Steven Kazlowski / Wolverine (Gulo gulo) adult scavenging along the 1002 coastal plain of the Arctic National Wildlife Refuge, North Slope of Brooks Range, Alaska, USA

Danny Green / Wolverine (Gulo gulo) crossing a log on water. Finland, Europe, June.

Danny Green / Wolverine (Gulo gulo) in forest habitat. Finland, Europe, June.

Danny Green / Wolverine (Gulo gulo) portrait in forest. Finland, Europe, June.

Danny Green / Wolverine (Gulo gulo) in a forest, standing on hind legs. Finland, Europe, June.

Lassi Rautiainen / Wolverine (Gulo gulo) near woodland wildlife watching and photography hide, Kuhmo, Finland, April

Sergey Gorshkov / Wolverine (Gulo gulo) on branch of Birch tree, sniffing, Kamchatka, Far East Russia, April 2008

Sergey Gorshkov / Wolverine (Gulo gulo) climbing birch tree, striping bark from the trunk to feed on, Kamchatka, Far East Russia, April 2008

Sergey Gorshkov / Wolverine (Gulo gulo) walking along branch of fallen tree, Kamchatka, Far East Russia, April 2008

Sergey Gorshkov / Wolverine (Gulo gulo) climbing tree, Kamchatka, Far East Russia, April

Sergey Gorshkov / Wolverine (Gulo gulo) on fallen tree beside den, Kamchatka, Far East Russia, April 2008

Sergey Gorshkov / Wolverine (Gulo gulo) crosses snow field, Kamchatka, Far East Russia, April 2008

Sergey Gorshkov / Wolverine (Gulo gulo) walking over snow, Kamchatka, Far East Russia, April 2008

Sergey Gorshkov / Red fox (Vulpes vulpes) standing on fallen tree beside wolverine den, Kamchatka, Far east Russia, April

Orsolya Haarberg / Wolverine (Gulo gulo) Finland

Bryan and Cherry Alexander / Wolverine (Gulo gulo) tracks in snow on tundra near Numto. Khanty Mansiysk, Western Siberia, Russia.

Igor Shpilenok / Wolverine (Gulo gulo) and Red fox (Vulpes vulpes) feast on the carcass of a bear that didn't make it through the winter. Kronotsky Zapovednik, Kamchatka, Russia

Igor Shpilenok / Wolverine (Gulo gulo) scavenging a bear carcass in the snow. Zapovednik, Kamchatka, Russia

Igor Shpilenok / Wolverine (Gulo gulo) scavenging a carcass in the snow. Zapovednik, Kamchatka, Russia

David Pike / Mount Fuji rising above cloud level Kawaguchi Ko Japan

David Pike / White tailed eagle {Haliaeetus albicilla} Nemuro straits Japan

David Pike / Japanese crane displaying {Grus japonensis} Akan Japan

David Pike / Japanese cranes displaying {Grus japonensis} Tsurui Mura Japan

David Pike / Japanese crane courtship display {Grus japonensis} Hokkaido Japan Feb/March

David Pike / Two European polecat kittens (Mustela putorius) in grass, West Country Wildlife Photography Centre, captive, July.

David Pike / Harvest mouse (Micromys minutus) on stalk, West Country Wildlife Photography Centre, captive, June.

David Pike / Hedgehog (Erinaceus europaeus) in woodland, Devon, England, UK, April. Captive.

David Pike / Gelada baboon mature male portrait with wind blown hair (Theropithecus gelada) Simien Mountains NP, Ethiopia

David Pike / Gelada baboon male standing aggressively facing group {Theropithecus gelada} Ethiopia

David Pike / Gelada baboon baby (dark coat) sitting on tail base of mother {Theropithecus gelada} Ethiopia

David Pike / Gelada baboon lip flip display (uncertainty) {Theropithecus gelada} Simien mtn NP, Ethiopia

David Pike / Polar bear with very small cubs {Ursus maritimus} Canada

David Pike / Polar bear walking with very small cubs following {Ursus maritimus} Canada

David Pike / Polar bear walking with very small cub {Ursus maritimus} Watchee lodge, Canada

David Pike / Female Polar bear with very small cubs {Ursus maritimus} Canada

David Pike / Japanese macaques in tree {Macaca fuscata} Jigokudani, Japan

David Pike / Japanese macaque portrait {Macaca fuscata} Jigokudani, Japan

David Pike / Whooper swan on water {Cygnus cygnus} Akan ko, Japan

David Pike / Whooper swan portrait on water {Cygnus cygnus} Kussharo ko, Japan

David Pike / Steller's sea eagles perched in tree {Haliaeetus pelagicus} Nemuro Straits, Japan

David Pike / Whooper swan {Cygnus cygnus} preening under wing, Kussharo ko, Japan.

David Pike / Japanese macaques warming up and grooming in hot pools {Macaca fuscata} Jigokudani, Japan

David Pike / Japanese macaque {Macaca fuscata} sitting in conifer tree Jigokudani, Japan

David Pike / Japanese macaque in snow {Macaca fuscata} Jigokudani, Japan

David Pike / Japanese cranes in snow storm {Grus japonensis} Tsurui Mura, Japan

David Pike / Japanese cranes courtship dance {Grus japonensis} Akan, Japan

David Pike / Japanese cranes courtship display {Grus japonensis} Akan, Japan

David Pike / Japanese crane displaying {Grus japonensis} Akan, Japan

David Pike / Japanese crane displaying {Grus japonensis} Akan, Japan

David Pike / Japanese crane in snow {Grus japonensis} Hokkaido, Japan Feb/March

David Pike / Marsh woundwort (Stachys palustris), close up. Harpers Ponds, near Double Locks, Exeter, Devon. July. Focus stacked image.

David Pike / Round-leaved sundew (Drosera rotundifolia), close up. Bystock Pools, Devon Wildlife Trust nature reserve, near Exmouth, Devon. June. Focus stacked image.

David Pike / German short-haired pointer on tor. Dartmoor, Devon, England, UK. July 2019.

David Pike / German short-haired pointer following scent in woods. Stoke Woods, Exeter, Devon, England, UK. July 2019.

David Pike / German short-haired pointer on hillside. Dartmoor, National Park, Devon, England, UK. July 2019.

David Pike / German short-haired pointer amongst heather on hillside. Dartmoor, Devon, England, UK. July 2019.

David Pike / German short-haired pointer lying down in grassland.

David Pike / German short-haired pointer running in grassland.

David Pike / German short-haired pointer standing in acid grassland.

David Pike / German short-haired pointer sitting on tor. Darmoor, Devon, England, UK. July 2017.

David Pike / German short-haired pointer lying down on lawn.

David Pike / German short-haired pointer looking over shoulder in coniferous forest. Winsford, Somerset, England, UK.

David Pike / German short-haired pointer standing in snow. Dartmoor National Park, Devon, England, UK. March.

David Pike / German short-haired pointer sitting in woods. England, UK. December.

David Pike / German short-haired pointer running through Heather. Dartmoor, Devon, England, UK. August.

David Pike / German short-haired pointer standing in grassland.

David Pike / Andean condor (Vultur gryphus) juvenile on building, Farellones, Chile.