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Adult humpback whale (Megaptera novaeangliae) breaching along the west side of Chatham Strait in Alaska, United States of America

View of swans and ducks with Lutheran Free Church in background in the city centre of Reykjavik at dusk in winter, Reykjavik, Iceland

A view of the tidewater glacier in Isbukta (Ice Bay) on the western side of Spitsbergen Island, Svalbard Archipelago, Norway

Mother polar bear (Ursus maritimus), with cub of the year in Holmabukta in the Svalbard Archipelago, Norway

Humpback whale (Megaptera novaeangliae) surfacing in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

Adelie penguin losing down feathers on ice, Antarctica, Polar Regions

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

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

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

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

Scuro lake in spring, Val Piora, Canton Ticino, Switzerland

Glacier in Prins Christians Sund, South Greenland, Greenland

Female Canada Goose, Branta canadensis, with young goslings, on River Windrush at Swinbrook, the Cotswolds, UK

Female mallard duck with new ducklings, Anas platyrhynchos, on a stream in springtime at Swinbrook, the Cotswolds, UK

Water flowing from a natural spring through Cotswolds stone and Wild Watercress at Swinbrook, the Cotswolds, Oxfordshire, UK

Common pool frog, water frog, rana esculenta, spring, on treestump, oetwil am see, zuerich, switzerland

King penguins (aptenodytes patagonicus) right whale bay, south georgia, in snowy landscape

Common pool frog, water frog, rana esculenta, spring, in pond, oetwil am see, zuerich, switzerland

Beech leaves, beech tree, fagus sylvaticia l., covered in hoarfrost, switzerland

King penguin (aptenodytes patagonicus) st andrews bay, south georgia, small group in snowy landscape

Common pool frog, water frog, rana esculenta, spring, in pond, oetwil am see, zuerich, switzerland

King penguins (aptenodytes patagonicus) right whale bay, south georgia, group huddled together in blizzard

King penguins (aptenodytes patagonicus) right whale bay, south georgia, group huddled together in snowy landscape

Common pool frog, water frog, rana esculenta, spring, in pond, oetwil am see, zuerich, switzerland

King penguin (aptenodytes patagonicus) st andrews bay, south georgia, small group in snowy landscape

Swiss alps, fusshoerner, grosses fusshorn, 3627m, alpine lake, aletsch area, unesco heritage, wallis, switzerland, fall, autumn

Beech leaves, fagus sylvaticia l., covered in hoarfrost, switzerland

King penguins (aptenodytes patagonicus) st andrews bay, south georgia, group in snowy landscape

Iceberg, antarctica. Iceberg alley, penola strait

King penguin (aptenodytes patagonicus) st andrews bay, south georgia, small group in snowy landscape

King penguins (aptenodytes patagonicus) right whale bay, south georgia, in snowy landscape

Snow and cloud covered mountain, south georgia

Dolomites, italy. South tyrol, cinquetorri

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

A small group of caribou (Rangifer tarandus) migrating north to feeding grounds in the spring from Yellowknife, Northwest Territories, Canada

Guests from the Lindblad Expedition ship National Geographic Explorer take the Polar Plunge off ice floe in the Weddell Sea, Antarctica, Southern Ocean

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

A small group of caribou (Rangifer tarandus) migrating north to feeding grounds in the spring from Yellowknife, Northwest Territories, Canada

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

A small group of caribou (Rangifer tarandus) migrating north to feeding grounds in the spring from Yellowknife, Northwest Territories, Canada

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

Guests from the Lindblad Expedition ship National Geographic Explorer take the Polar Plunge off ice floe in the Weddell Sea, Antarctica, Southern Ocean

Researchers from OCEANITES counting penguins from the Lindblad Expedition ship National Geographic Explorer (shown here is )working in Antarctica

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

A small group of caribou (Rangifer tarandus) migrating north to feeding grounds in the spring from Yellowknife, Northwest Territories, Canada

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

A small group of caribou (Rangifer tarandus) migrating north to feeding grounds in the spring from Yellowknife, Northwest Territories, Canada

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

Ice and frost on the beach and sand dunes at Sandscale Haws near Barrow in Furness, Cumbria, England, United Kingdom, Europe

Guests from the Lindblad Expedition ship National Geographic Explorer take the Polar Plunge off ice floe in the Weddell Sea, Antarctica, Southern Ocean

Blizzard conditions cause the ocean's surface to begin to freeze in Dahlmann Bay, Antarctica, Southern Ocean. MORE INFO First signs of grease ice as the surface of the sea begins to freeze.

Heart-shaped pool on saltmarsh, Scotland

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

A small group of caribou (Rangifer tarandus) migrating north to feeding grounds in the spring from Yellowknife, Northwest Territories, Canada

A Cold Walk, Buffalo At Yellowstone Lake, Bovidae bison; Bison; Buffalo; Buffalo in Winter; Buffalo in Winter in Yellowstone; Winter In Yellowstone; Yellowstone Winter

Guests from the Lindblad Expedition ship National Geographic Explorer take the Polar Plunge off ice floe in the Weddell Sea, Antarctica, Southern Ocean

Guests from the Lindblad Expedition ship National Geographic Explorer taking the "polar plunge" inside the caldera at Deception Island in Antarctica

A small group of caribou (Rangifer tarandus) migrating north to feeding grounds in the spring from Yellowknife, Northwest Territories, Canada

Guest from the Lindblad Expedition ship National Geographic Explorer with gentoo penguin chick in Antarctica

Details of the ice road from Tibbitt to Contwoyto beginning just outside of Yellowknife, Northwest Territories, Canada

Lindblad Expeditions guests doing the "polar Plunge" in Port Foster near Whalers Bay inside the caldera on Deception Island, South Shetland Island Group, Antarctica. NO MODEL RELEASES FOR THIS IMAGE.

Guests from the Lindblad Expedition ship National Geographic Explorer take the Polar Plunge off ice floe in the Weddell Sea, Antarctica, Southern Ocean

Details of the ice road from Tibbitt to Contwoyto beginning just outside of Yellowknife, Northwest Territories, Canada

Heart of granite

Guests from the Lindblad Expedition ship National Geographic Explorer kayaking near Monaco Glacier on Spitsbergen Island in the Svalbard Archipelago in the summer months.

Guests from the Lindblad Expedition ship National Geographic Explorer take the Polar Plunge off ice floe in the Weddell Sea, Antarctica, Southern Ocean

Guests from the Lindblad Expedition ship National Geographic Explorer kayaking near Monaco Glacier on Spitsbergen Island in the Svalbard Archipelago in the summer months.

Guests from the Lindblad Expedition ship National Geographic Explorer take the Polar Plunge off ice floe in the Weddell Sea, Antarctica, Southern Ocean

Guest from the Lindblad Expedition ship National Geographic Explorer with gentoo penguin chick in Antarctica

Details of the ice road from Tibbitt to Contwoyto beginning just outside of Yellowknife, Northwest Territories, Canada

Strawberry Poison Frog (Dendrobates pumilio), adult, Bastimentos National Park, Bocas del Toro, Panama. The strawberry poison frog or strawberry poison-dart frog (Oophaga pumilio or Dendrobates pumilio) is a species of small amphibian poison dart frog found in Central America. It is common throughout its range, which extends from eastern central Nicaragua through Costa Rica and northwestern Panama. The species is often found in humid lowlands and premontane forest, but large populations are also found in disturbed areas such as plantations. The strawberry poison frog is perhaps most famous for its widespread variation in coloration, comprising approximately 15��30 color morphs, most of which are presumed to be true-breeding. O. pumilio, while not the most poisonous of the dendrobatids, is the most toxic member of its genus. The species is most diverse in Panama with varieties in vivid shades of all red, orange, blue, yellow or green, green and yellow, white with red, orange or black and spotted varieties. The most colorful mix is found in Isla Bastimentos Marine National Park though not all in one place. Colors vary by location. A beach on the north side of the island is named after the species. Two of Southern Explorations' Panama tours visit red frog habitat. Both the eight-day Panama Adventure trip and eleven-day Panama Highlights trip spend time in Isla Bastimentos Marine National Park and the former also goes to Red Frog Beach. The red frog is not as poisonous as some of its cousins and is not a threat to humans. It subsists on a diet of ants that dine on poisonous plants, providing the red frog its protective skin toxin. Males attract females with a loud quick chirp. To hear the distinctive sound before you depart on your Panama tours, go to the University of Michigan Museum's biodiversity website (www.animaldiversity.ummz.umich.edu.) After birth, the tadpoles climb aboard the mother who deposits them in different protected areas where she retu