Polar bear with cub on the ice in the Arctic Ocean north of western Russia.

Polar bear tracks on the ice in the Arctic Ocean north of western Russia.

A polar bear paw print on the ice in the Arctic Ocean north of western Russia.

A polar bear (Ursus maritimus) on the ice in the Arctic Ocean north of western Russia.

A walrus on the ice in the Arctic Ocean north of western Russia. Odobenus rosmarus rosmarus - the Atlantic subspecies of walrus.

A walrus on the ice in the Arctic Ocean north of western Russia. Odobenus rosmarus rosmarus - the Atlantic subspecies of walrus.

Walrus swimming with eyes and a little bit of mustache above water.

Raccoon (Procyon lotor).

Mule deer feeding on riparian vegetation on a frozen over Camas Creek.

Elk wintering in riparian vegetation on a frozen over Camas Creek.

Mule deer along a frozen creek bottom.

Antelope in eastern Oregon.

Antelope in eastern Oregon.

Wintering mule deer in riparian vegetation.

Young Alaska Brown Bear (Ursus arctos) strolling on the beach.

Large Alaska Brown Bear (Ursus arctos) waiting for dinner to swim by.

Saddleback Tortoise

Galapagos Tortoise displaying long serpentine neck.

Giant Tortoise.

Giant Tortoise portrait.

Giant Tortoises.

Giant tortoise.

Charging tortoise.

Male Espanola lava lizard.

Male Espanola lava lizard.

Marine iguanas.

Sea lion pup surrounded by marine iguanas. Peaceful coexistence.

Marine iguanas.

Marine iguanas.

Marine iguana portrait.

Marine iguana.

Marine iguana.

Marine iguana.

Marine iguana.

Marine iguana swimming.

Marine iguana.

Marine iguana.

Marine iguana.

Marine iguanas.

Gregarious marine iguanas holding a convention.

Gregarious marine iguanas holding a convention.

Gregarious marine iguanas holding a convention.

Marine iguanas debating which one is tougher.

Marine iguanas.

Marine iguanas.

Marine iguanas.

Marine iguana.

Marine iguana.

Land iguana.

Land iguana.