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

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

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

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

Lynn M Stone / Wolverine {Gulo gulo} captive

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

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

Peter Mather / Brown Bear (Ursus arctos) looking into Wolverine (Gulo gulo) caching hole for food, North Slope, Alaska

Duncan Usher / Wolverine (Gulo gulo), Sababurg, Hessen, Germany

Jasper Doest / Wolverine (Gulo gulo) in a tree, Norway

Jasper Doest / Wolverine (Gulo gulo) climbing in a tree, Norway

Jasper Doest / Wolverine (Gulo gulo) in the snow, Norway

Jasper Doest / Wolverine (Gulo gulo) in a tree, Norway

Jasper Doest / Wolverine (Gulo gulo) climbing tree, Norway

Jussi Murtosaari / Wolverine (Gulo gulo) digging through snow searching for food, Finland. May.

Jussi Murtosaari / Wolverine (Gulo gulo) walking through snow covered clearing, Finland. May.

Markus Varesvuo / Wild Wolverine (Gulo gulo) walking in snow, Mainua Kajaani, Finland. March.

Markus Varesvuo / Wild Wolverine (Gulo gulo) walking in snow, Mainua Kajaani, Finland. March.

Bryan and Cherry Alexander / Leova Serotetto, a Nenets reindeer herder, holds a dead wolverine that he shot near his family's reindeer herd. Yamal, NW Siberia, Russia. 2017.

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.

Andy Rouse / Wolverine (Gulo gulo) in forest at sunrise. Finland

Ernie Janes / Wolverine (Gulo gulo) licking antler to keep its teeth healthy and for calcium and other nutrients. Captive.

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

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