Adult striated caracara (Phalcoboenus australis), close-up, on Carcass Island in the Falkland Islands, South Atlantic Ocean, South America

A lone adult emperor penguin (Aptenodytes forsteri) on sea ice in the Gullet between Adelaide Island and the Antarctic Peninsula, Antarctica, Polar Regions

Adult snow petrel (Pagodroma nivea nivea) near the Antarctic Peninsula, Antarctica, Southern Ocean, Polar Regions

Black Spiny-tailed iguana (Ctenosaura similis), on New River near Lamanai, Belize

Tiny melons, Tibesti Mountains, Chad

Adult Svalbard reindeer (Rangifer tarandus platyrhynchus) grazing within the town limits of Longyearbyen, Svalbard, Norway

A lone adult emperor penguin (Aptenodytes forsteri) on sea ice in the Gullet between Adelaide Island and the Antarctic Peninsula, Antarctica, Polar Regions

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) on Espanola Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

White saxaul (Haloxylon persicum), Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia

Adult rockhopper penguin (Eudyptes chrysocome chrysocome) at breeding and molting colony on New Island, Falkland Islands

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The endemic Opuntia cactus (Opuntia echios) cactus growing in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Galapagos shearwater (Puffinus subalaris) nesting in lava nook in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Round-headed katydid (bush cricket) (Amblycorypha), earhole in forelegs, superb leaf mimic with leg scraping song, Guanacaste, Costa Rica

Adult yellow-lipped sea krait (Laticauda colubrina) snake, coming ashore at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific