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

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

Wild Wonders of Europe / Widstra / Eurasian wolverine (Gulo gulo) in long grass, Kuhmo, Finland, July 2008. BOOK & WWE OUTDOOR EXHIBITION.

Igor Shpilenok / Wolverine (Gulo gulo) walking in the snow. Wolverine's paws are large, allowing them to walk easily through deep snow. Zapovednik, Kamchatka, Russia

Wild Wonders of Europe / Widstrand / Wolverine (Gulo gulo) carrying prey, wading through mud, Kuhmo, Finland, September 2008

Wild Wonders of Europe / Widstrand / Eurasian wolverine (Gulo gulo) Kuhmo, Finland, September 2008

Wild Wonders of Europe / Widstrand / Wild Eurasian wolverine (Gulo gulo) walking along waters edge, Kuhmo, Finland, July 2008

Wild Wonders of Europe / Widstrand / Wild Eurasian wolverine (Gulo gulo) Kuhmo, Finland, July 2008

Wild Wonders of Europe / Widstrand / Wild Eurasian wolverine (Gulo gulo) Kuhmo, Finland, July 2008

Pete Cairns / Wolverine in snow {Gulo gulo} captive Norway

Pete Cairns / Wolverine in snow {Gulo gulo} captive, Norway

Danny Green / RF - Wolverine (Gulo gulo) in the snow. Finland, March. (This image may be licensed either as rights managed or royalty free.)

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

Danny Green / Wolverine (Gulo gulo) standing on back legs next to tree. Finland, September.

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

Claudio Contreras / Greater grison (Galictis vittata), captive, Palenque, southern Mexico, July

Claudio Contreras / Greater Grison (Galictis vittata), captive, Palenque, southern Mexico, July

Claudio Contreras / Greater grison (Galictis vittata), captive, Palenque, southern Mexico, July

Claudio Contreras / Greater grison (Galictis vittata) in water, captive, Palenque, southern Mexico, July

Sylvain Cordier / Wolverine (Gulo gulo) Finland.

Valeriy Maleev / Wolverine (Gulo gulo) in snow, Finland. April.

Valeriy Maleev / Wolverine (Gulo gulo) in snow, Finland. April.

Valeriy Maleev / Wolverine (Gulo gulo) in snow, Finland. April.

Danny Green / Wolverine (Gulo gulo) portrait in a forest, Finland, July

Roger Powell / Old Goldeneye Nestbox crafted from a log and chained to the side of a lodge to protect it from Wolverines. Kaalimaa, Pokka, Inari, Lapland, Finland

Roger Powell / Old Goldeneye Nestbox crafted from a log and chained to the side of a lodge to protect it from Wolverines. Kaalimaa, Pokka, Inari, Lapland, Finland, June.

Sergey Gorshkov / Wolverine (Gulo gulo) scavenging Siberian tundra reindeer (Rangifer tarundus sibericus) carcass, Putoransky State Nature Reserve, Putorana Plateau, Siberia, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) scavenging Siberian tundra reindeer (Rangifer tarundus sibericus) carcass, Putoransky State Nature Reserve, Putorana Plateau, Siberia, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) scavenging Siberian tundra reindeer (Rangifer tarundus sibericus) carcass, Putoransky State Nature Reserve, Putorana Plateau, Siberia, Russia

Orsolya Haarberg / Wolverine (Gulo gulo) chasing a Reindeer (Rangifer tarandus) herd in the Padjelanta National Park, Laponia World Heritage Site, Swedish Lapland, Sweden. December 2016.

Orsolya Haarberg / Wolverine (Gulo gulo) chasing a Reindeer (Rangifer tarandus) herd in the Padjelanta National Park, Laponia World Heritage Site, Swedish Lapland, Sweden. December 2016.

Sylvain Cordier / Wolverine (Gulo gulo) Kuhmo, Finland

Sylvain Cordier / Wolverine (Gulo gulo) den, Kuhmo, Finland

Sylvain Cordier / Wolverine (Gulo gulo), climbing a tree, Kuhmo, Finland

Juan Carlos Munoz / Wolverine (Gulo gulo) climbing tree, captive, Finland.

Loic Poidevin / Wolverine (Gulo gulo) in forest, Finland, May.

Loic Poidevin / Wolverine (Gulo gulo) in forest, Finland, May.

Loic Poidevin / Wolverine (Gulo gulo) in forest, Finland, April.

Gabriel Rojo / Little grison (Galictis cuja) foraging, La Pampa, Argentina.

Gabriel Rojo / Little grison (Galictis cuja) portrait, La Pampa Argentina

Roger Powell / Wolverine (Gulo gulo) in long grass, Animal Park, Hann-Munden, Lower Saxony, Germany. Captive, occurs throughout the boreal zone of the northern hemisphere.

Roger Powell / Wolverine (Gulo gulo) Hann-Munden, Lower Saxony, Germany. Captive

Andy Trowbridge / Wolverine (Gulo gulo) standing up on back legs. Lieksa, Finland. July.

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.

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