Donald M. Jones / Sea Otter (Enhydra lutris), Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) on snow yawning, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) on snow, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) grooming on snow, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) on snow, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) snow, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) mother grooming pup, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris), Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) mother grooming pup, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) on snow, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) mother with pup on belly, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) grooming, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) emerging from water, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris), Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) trio, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris), Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) on snow, Prince William Sound, Alaska

Donald M. Jones / American Badger (Taxidea taxus) at den, western Montana

Donald M. Jones / American Badger (Taxidea taxus) with dirt covered face at den, western Montana

Donald M. Jones / American Badger (Taxidea taxus) cub at den, western Montana

Donald M. Jones / American Badger (Taxidea taxus) and cub at den, western Montana

Donald M. Jones / American Badger (Taxidea taxus) at den, western Montana

Donald M. Jones / American Badger (Taxidea taxus) at den, western Montana

Donald M. Jones / American Badger (Taxidea taxus) at den, western Montana

Donald M. Jones / American Badger (Taxidea taxus) at den, western Montana

Suzi Eszterhas / African Wild Dog (Lycaon pictus) pack facing off with two Honey Badgers(Mellivora capensis), northern Botswana

Hiroya Minakuchi / North American River Otter (Lontra canadensis) family, Prince William Sound, Alaska

Hiroya Minakuchi / Sea Otter (Enhydra lutris), Kenai Fjords, Alaska

Hiroya Minakuchi / Sea Otter (Enhydra lutris) grooming, Kenai Fjords, Alaska

Kevin Schafer / Marine Otter (Lontra felina) female carrying octopus, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) mother and pup on shore, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) swimming, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) female carrying crab to pup, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) in kelp on shore, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) on shore, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) feeding at surface, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) female eating octopus on shore, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) carrying octopus, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) young in kelp bed, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) in kelp bed, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) on shore carrying crab prey, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) on kelp, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) mother and pup swimming, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) yawning, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) young in heavy surf, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) pair swimming, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) mother and pup in kelp bed, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) mother and pup swimming, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) carrying large octopus, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) resting on kelp-covered rocks, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) swimming underwater, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) jumping, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) feeding, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) in kelp bed, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) feeding, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) mother carrying pup, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) swimming at surface, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) male in sleeping cave, Peru

Sergey Gorshkov / Wolverine (Gulo gulo) on tree, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) on tree, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo), Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) on tree, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) on tree, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo), Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) foraging in snow, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) tracks in snow, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) walking on snow, Kamchatka, Russia

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

Sergey Gorshkov / Wolverine (Gulo gulo) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) walking on snow with Red Fox (Vulpes vulpes) in the background, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) climbing up rock, Kamchatka, Russia

Sergey Gorshkov / Wolverine (Gulo gulo) in snow-covered landscape, Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina) sniffing log, Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina), Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina) in tree, Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina) walking on snow, Kamchatka, Russia

Sergey Gorshkov / Sable (Martes zibellina) on snow, Kamchatka, Russia

Sergey Gorshkov / European River Otter (Lutra lutra) pair, Kamchatka, Russia

Sergey Gorshkov / European River Otter (Lutra lutra) pair playing, Kamchatka, Russia

ZSSD / North American River Otter (Lontra canadensis) on the lookout, native to North America

Michael Quinton / Sea Otter (Enhydra lutris) feeding on Pink Salmon (Oncorhynchus gorbuscha), Prince William Sound, Alaska

Michael Quinton / Sea Otter (Enhydra lutris) feeding on Pink Salmon (Oncorhynchus gorbuscha) while gull waits for scraps, Prince William Sound, Alaska

Sebastian Kennerknecht / Sea Otter (Enhydra lutris) resting on beach, Elkhorn Slough, Monterey Bay, California

Luciano Candisani / Giant River Otter (Pteronura brasiliensis) swimming towards camera, Rio Negro, Brazil

Luciano Candisani / Giant River Otter (Pteronura brasiliensis) lifting head out of water, Rio Negro, Brazil

Luciano Candisani / River Otter (Lontra longicaudis) climbing on snag, Rio Negro, Pantanal, Brazil

Luciano Candisani / River Otter (Lontra longicaudis) climbing on snag, Rio Negro, Pantanal, Brazil

Luciano Candisani / River Otter (Lontra longicaudis) eating a fish, Rio Negro, Pantanal, Brazil

Konrad Wothe / Giant River Otter (Pteronura brasiliensis) pair fighting over fish prey, Tambopata National Reserve, Peru