
Adelie Penguin
These gallant-fighting, deep-diving namesakes of the French-claimed Antarctic Adélie Land are among the four penguin species on mainland Antarctica
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Antarctic Fur Seal
Once hunted nearly into extinction, these pointy-eared polar swimmers are the comeback queens and kings of the Antarctic
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Antarctic Petrel
These feathered fish-eaters are among the planet's most southerly nesting birds, the "petrel" of their name deriving from Saint Peter for their seeming ability to walk on water
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Arctic Fox
Small but sturdy, these members of the canidae family can withstand some of Earth's coldest temperatures
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Arctic Hare
They can run like the wind, see everything around them without turning their heads, and sometimes eat animals instead of leaves – all while looking this cute
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Parasitic Jaeger
These far-ranging fliers are known for their love of (and skill for) thievery, pilfering most of their winter migration diet
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Arctic Tern
Among the most nomadic birds on the planet, these sun-loving tourists summer twice a year during their ambitious routes
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Atlantic Yellow-Nosed Albatross
These so-called "foolish gulls" aren't so very foolish, capable of gliding for miles without a single flap of their wings
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Atlantic puffin
These horn-beaked auklets have nicknames both jocular and solemn: "sea clowns" for their facial hues, "little brothers of the north" for the monk-like tones of their plumage
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Barnacle Goose
Vanishing from Western Europe in the summer, these long-necked locals earned the medieval reputation for being borne of barnacles
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Bearded Seal
The largest of their kind to take up in the Arctic, these loud-singing sopranos sport whiskers so long they were named after them
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Beluga Whale
The good-natured grin of these dolphin relatives is matched only by their high-frequency sounds, from which they derive the nickname "sea canaries"
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Black Guillemot
These distinguished puffin relatives have a keen eye for decorum, matching their feathers to the landscape and holding fish in their beaks
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Black-Crowned Night Heron
The warmth of their nesting instinct belies the darkness of their name, though that doesn't keep these night hunters from feeding during hours competition is at a low
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Black-browed Albatross
So efficient in the air that their in-flight heart rate barely rises above resting, these sub-Antarctic birds pack a stomach full of oil they can spit at would-be attackers
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Blue Petrel
Spending all but the breeding season out to sea, these sole claimants of the genus Halobaena dash across the water to gain speed before liftoff
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Blue Whale
The largest-known creatures the Earth has ever produced have lifespans comparable to ours, though not hearts: Theirs can outweigh most vehicles
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Antarctic Shag
The only Antarctic bird to keep a year-round nest as long as the ice holds off, these neighbor-robbing homebodies are a welcome sight for sailors in search of land
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Bowhead Whale
Reputed to have one of the longest lifespans of any animal on the planet, these sages of the sea also have the largest mouths – if only they could speak
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Thick-billed Murre
They may expend a great deal of energy in flight, but that hardly concerns these tightly nesting (though largest-living) members of the Alcidae family
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