Shortened ears and thick, white fur are among the physical traits that arctic hares have adapted to survive in the harsh, frozen tundra.
The lush white coat of the arctic fox provides both warmth and camouflage in winter.
Baby Harp Seal
A baby harp seal rests on the Arctic ice. Its mother can distinguish it from hundreds of others by scent alone.
Desert Cottontail Rabbit
Ubiquitous throughout North and South America, cottontail rabbits, including this desert variety, are noted for their fluffy “cotton” tail.
Thick, shaggy fur keeps musk-oxen warm in the harsh Arctic tundra.
Of the three remaining species of tigers, Siberian tigers are the largest. While there are only 400 to 500 left in the wild, the population is considered stable, and conservation programs are introducing captive-born tigers to the wild.
Bighorn sheep live in divided herds: ewes and lambs together in larger groups, rams in smaller bachelor herds. They usually only cross paths in the fall for mating.
Emperor penguins are the largest penguins, standing about 4 feet (1.2 meters) tall.