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First year Adelie penguin (Pygoscelis adeliae) chicks at breeding colony at Brown Bluff, Antarctica, Polar Regions

Adelie penguin (Pygoscelis adeliae) on ice floe with leopard seal at Brown Bluff, Antarctica, Polar Regions

Adelie penguin (Pygoscelis adeliae) on ice floe with leopard seal at Brown Bluff, Antarctica, Polar Regions

Adelie penguins (Pygoscelis adeliae) hauled out onto the ice near Adelaide Island, Antarctica, Polar Regions

Chinstrap penguin (Pygoscelis antarctica) breeding and molting at Half Moon Island, Antarctica, Southern Ocean, Polar Regions

Gentoo penguin (Pygoscelis papua) chick chasing adult for food at Hannah Point on Livingston Island, Antarctica, Polar Regions

Gentoo penguin (Pygoscelis papua) chicks covered with mud and guano on Cuverville Island, Antarctica, Southern Ocean, Polar Regions

Close-up of head of Chinstrap penguin (Pygoscelis antarcticus), Half Moon Island, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), Port Lockroy British Antarctic Base, Wiencke Island, Antarctica, Polar Regions

Abandoned former whaling station at Port Foster inside of the caldera at Deception Island, South Shetland Islands, Antarctica, Polar Regions

Grave site at the abandoned former whaling station at Port Foster inside of the caldera at Deception Island, Antarctica, Polar Regions

Antarctic shag (Phalacrocorax (atriceps) bransfieldensis) at nesting site amongst gentoo penguins at Jougla Point, Antarctica, Polar Regions

Antarctic shag (Phalacrocorax (atriceps) bransfieldensis) at nesting site amongst gentoo penguins at Jougla Point, Antarctica, Polar Regions

Adult female leopard seal (Hydrurga leptonyx) hauled out on an ice floe in Kayak Cove on Brabant Island, Antarctica, Polar Regions

Views of the Errera Channel, between the west coast of Antarctica and Ronge Island, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua) nesting colony almost buried by snow during snow storm at Brown Bluff, Antarctica, Polar Regions

Gentoo penguin (Pygoscelis papua) hauled out in Port Foster, inside the caldera at Deception Island, Antarctica, Polar Regions

Gentoo penguin (Pygoscelis papua) mating behavior at Jougla Point on Wiencke Island, Antarctica, Southern Ocean, Polar Regions

Gentoo penguin (Pygoscelis papua) nesting colony at Jougla Point on Wiencke Island, Antarctica, Southern Ocean, Polar Regions

Views of the Chilean Antarctic refuge hut Jorge Bonnen Rivera situated on Hut Point on the Antarctic Peninsula, Antarctica, Polar Regions

Adult female leopard seal (Hydrurga leptonyx) hauled out on an ice floe in Kayak Cove on Brabant Island, Antarctica, Polar Regions

Adult female leopard seal (Hydrurga leptonyx) hauled out on an ice floe in Kayak Cove on Brabant Island, Antarctica, Polar Regions

Adult female leopard seal (Hydrurga leptonyx) hauled out on an ice floe in Kayak Cove on Brabant Island, Antarctica, Polar Regions

Adult female leopard seal (Hydrurga leptonyx) hauled out on an ice floe in Kayak Cove on Brabant Island, Antarctica, Polar Regions

Iceberg detail in and around the Antarctic Peninsula during the austral summer months, Antarctica, Southern Ocean, Polar Regions

Icebergs and brash ice in Kayak Cove, during the austral summer months, Brabant Island, near the Antarctic Peninsula, Antarctica, Polar Regions

Crabeater seals (Lobodon carcinophaga) hauled out on ice floe near the Antarctic Peninsula, Antarctica, Polar Regions

Crabeater seal (Lobodon carcinophaga) hauled out on ice floe near the Antarctic Peninsula, Antarctica, Polar Regions

Crabeater seals (Lobodon carcinophaga) hauled out on ice floe near the Antarctic Peninsula, Antarctica, Polar Regions

Crabeater seals (Lobodon carcinophaga) hauled out on ice floe near the Antarctic Peninsula, Antarctica, Polar Regions

Brash ice chokes the Lemaire Channel on the west side of the Antarctic peninsula in Antarctica, Polar Regions

Adult bull Weddell seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, Antarctica, Polar Regions

Adult Weddell seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, Antarctica, Polar Regions

Juvenile humpback whale (Megaptera novaeangliae) breaching near the Antarctic Peninsula, Antarctica, Polar Regions

A small pod of Type B killer whales (Orcinus nanus) just outside Duse Bay in the Weddell Sea, Antarctica, Polar Regions

Adelie penguin (Pygoscelis adeliae) on ice near Devil Island in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

Adelie penguins (Pygoscelis adeliae) in snowstorm at Brown Bluff on the Antarctic Peninsula in the Weddell Sea, Antarctica, Polar Regions

King penguins (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions

King penguin (Aptenodytes patagonicus) breeding and nesting colony on South Georgia Island, Southern Ocean, Polar Regions

King penguins (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions

Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead elephant seal pup at Royal Harbor, South Georgia

Excursion with zodiac around the Pia Glacier, Cordillera Darwin, Northeast branch of the Beagle Channel, Tierra del Fuego, Patagonia, Chile, South America

Gentoo penguin chicks (Pygoscelis papua) in ecstatic display at Brown Bluff, Antarctica, Polar Regions

Adult crabeater seals (Lobodon carcinophaga), from the National Geographic Explorer in the Lemaire Channel, Antarctica, Polar Regions

Type Big B killer whales (Orcinus orca) searching ice floes for pinnipeds in the Weddell Sea, Antarctica, Polar Regions

Type Big B killer whales (Orcinus orca), searching ice floes for pinnipeds in the Weddell Sea, Antarctica, Polar Regions

Type Little B killer whales (Orcinus orca), surfacing in the Gerlache Strait, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), playing in a meltwater pool at Jougla Point, Wiencke Island, Antarctica, Polar Regions

Adult Antarctic skua (Stercorarius antarcticus), eating a gentoo penguin egg at Port Lockroy, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), leaping off ice in Lindblad Cove, Trinity Peninsula, Antarctica, Polar Regions

A gentoo penguin (Pygoscelis papua), breeding colony beneath a Union Jack flag flying at British Base A at Port Lockroy, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), underwater in clear water in Lindblad Cove, Trinity Peninsula, Antarctica, Polar Regions

A gentoo penguin (Pygoscelis papua), breeding colony beneath Union Jack flag, at British Base A at Port Lockroy, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), underwater in clear water in Lindblad Cove, Trinity Peninsula, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), underwater in clear water in Lindblad Cove, Trinity Peninsula, Antarctica, Polar Regions

Adult emperor penguin (Aptenodytes forsteri), hauled out on ice near Snow Hill Island, Weddell Sea, Antarctica.

An Antarctic blue-eyed shag (Leucocarbo bransfieldensis), sits atop a rock in the Antarctic peninsula, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis Papua) afloat on an iceberg in the Antarctic peninsula, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis Papua), performing a mating ritual in the Antarctic peninsula, Antarctica, Polar Regions

Antarctica fur seal pup (Arctocephalus gazella), above and below underwater in Husvik Bay, South Georgia, Polar Regions

Juvenile leucistic Antarctic fur seal (Arctocephalus gazella), with its mother in Stromness Harbor, South Georgia, Polar Regions

Adult bull Antarctic fur seal (Arctocephalus gazella) head detail in Salisbury Plain, South Georgia, Polar Regions

Adult chinstrap penguins (Pygoscelis antarcticus), porpoising through the sea in Cooper Bay, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) breeding colony at Salisbury Plain, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) breeding colony at Salisbury Plain, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) chicks called Okum Boys at Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) chicks called Okum Boys at Gold Harbor, South Georgia, Polar Regions

Sunrise on king penguin (Aptenodytes patagonicus) breeding colony at Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) courtship display at breeding colony in Gold Harbor, South Georgia, Polar Regions

Adult King penguin (Aptenodytes patagonicus) breeding colony at Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) head detail at its breeding colony at Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) adults establishing partners at breeding colony in Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) adults establishing partners at breeding colony in Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) adult with chick at breeding colony in Gold Harbor, South Georgia, Polar Regions