Jack Dykinga / Cardon cactus (Pachycereus pringlei) and Biznaga/Barrel cactus (Ferocactus diguetii),growing at the edge of the sea, CONANP protected area.Catalina Island, Sea of Cortez, Baja Sur, Mexico. February 20...

Kirkendall-Spring / Perspective of mountain biker over handlebars, Taylor Canyon, Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Neil Lucas / Dragons blood trees (Dracena cinnibaris) and Desert rose (Adenium obesum socotranum) in Momi Valley, Socotra Island, Yemen, February 2008

Martin Gabriel / Fairy Tern (Gygis alba), Aride Island, Republic of Seychelles

Martin Gabriel / White-tailed Tropicbird (Phaethon lepturus), covered with sticky seeds of Pisonia grandis, making the bird unable to fly, Aride Island, Republic of Seychelles

Martin Gabriel / White-tailed Tropicbird (Phaethon lepturus), a ranger removing sticky Pisonia grandis seeds, which made the bird unable to fly, Aride Island, Republic of Seychelles

Martin Gabriel / Great Frigatebird (Fregata minor), adult in flight, Aride Island, Republic of Seychelles

Martin Gabriel / Great Frigatebird (Fregata minor), white-headed immature in flight, Aride Island, Republic of Seychelles

Martin Gabriel / Lesser Noddy (Anous tenuirostris) incubating chick on its nest, breeding, Aride Island, Republic of Seychelles

Martin Gabriel / Lesser Noddy (Anous tenuirostris) incubating chick on its nest, breeding, Aride Island, Republic of Seychelles

Martin Gabriel / Lesser noddy (Anous tenuirostris), portrait, Aride Island, Republic of Seychelles

Martin Gabriel / Lesser noddy (Anous tenuirostris), Aride Island, Republic of Seychelles

Martin Gabriel / Seychelles magpie robin (Copsychus sechellarum), Aride Island, Republic of Seychelles

Martin Gabriel / Seychelles Fody (Foudia sechellarum), male, Aride Island, Republic of Seychelles

Martin Gabriel / Seychelles Fody (Foudia sechellarum), female, Aride Island, Republic of Seychelles

Martin Gabriel / Bronze gecko (Ailuronyx seychellensis), Aride Island, Republic of Seychelles

Martin Gabriel / Wright's skink (Mabuya wrightii), Aride Island, Republic of Seychelles Vulnerable species

Thomas Lazar / Patterns in orange sand with flat plateaus behind, Island in the Sky section, Canyonlands National Park, Utah, Colorado Plateau, April 2010.

Thomas Lazar / Lower canyon and flat plateaus, Green River Overlook, Island in the Sky section, Canyonlands National Park, Utah, Colorado Plateau, April 2010.

Thomas Lazar / Sunrise at Mesa Arch, Island in the Sky section, Canyonlands National Park, Utah, Colorado Plateau, April 2010.

Thomas Lazar / Lower canyon on Colorado River, Island in the Sky section, Canyonlands National Park, Utah, Colorado Plateau, April 2010.

Thomas Lazar / Sandstone slabs along the edge of the plateau, Island in the Sky section, Canyonlands National Park, Utah, Colorado Plateau, April 2010.

Thomas Lazar / Patterns in orange sand with flat plateaus behind, Island in the Sky section, Canyonlands National Park, Utah, Colorado Plateau, April 2010.

Thomas Lazar / View from the curved edge of the plateau, Island in the Sky section, Canyonlands National Park, Utah, Colorado Plateau, April 2010.

Juan Carlos Munoz / Grey gibbon (Hylobates muelleri) swinging through trees, Kinabalu National Park, Borneo.

Kirkendall-Spring / Campsite in Taylor Canyon along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012.

Kirkendall-Spring / Mountain biker near Potato Bottom along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012.

Kirkendall-Spring / Mountain biker descending Murphy Hogback along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Mountain biker holding up his bike on top of Murphy Climb along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Mountain bikers between White Crack and Murphy Basin on the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Mountain bikers between White Crack and Murphy Basin on the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released. Digitally blurred.

Kirkendall-Spring / UT00304..UTAH - Mountain biker between White Crack and Murphy Basin on the White Rim Road in the Island In The Sky District of. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Mountain biker near White Crack along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Mountain biker near White Crack along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Mountain bikers between Airport and Gooseberry along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Mountain biker between Airport and Gooseberry along the White Rim Road in the Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Kirkendall-Spring / Sunrise at Mesa Arch in the Island In The Sky District of Canyonlands National Park. Utah, October 2012.

Tui De Roy / Galapagos land iguana (Conolophus subcristatus) in open volcanic habitat. Isabela Island, Galapagos, Isabela Island, Galapagos, Ecuador, June.

Inaki Relanzon / Little Sahara dunes with desert plant flowering at sunset, Seal Bay Conservation Park, Kangaroo Island, South Australia State, Australia, September 2011.

Inaki Relanzon / Little Sahara dunes with desert plant flowering, Seal Bay Conservation Park, Kangaroo Island, South Australia State, Australia, September 2011.

Inaki Relanzon / Little Sahara dunes, Seal Bay Conservation Park, Kangaroo Island, South Australia State, Australia, September 2011.

Stefan Huwiler / Prickly Pear Cactus (Opuntia echios) in dusty landscape. Puerto Egas Bay, Santiago Island, Galapagos Islands, Ecuador, South America, September 2008.

Brent Stephenson / Seychelles Warbler (Acrocephalus sechellensis) perched amongst vegetation. Aride Island, Seychelles.

Brent Stephenson / Seychelles Warbler (Acrocephalus sechellensis) perched amongst vegetation. Aride Island, Seychelles.

Brent Stephenson / White-tailed Tropicbird (Phaethon lepturus) chick still partially covered in down, at its nest. Aride Island, Seychelles.

Staffan Widstrand / Scrub growing on steep volcanic hillside. Bartholomew Island, Galapagos, Ecuador, April 2010.

Daniel Heuclin / Giant cactus growing between algae fossils (Echinopsis pasacana / atacamensis) Inkawasi island, Salar de Tunupa, Bolivia. 2008

Eric Baccega / Graves of Sir John Franklin's sailors dated 1846 on Beechey Island close to Devon Island. St John Franklin left England in 1845 and searched for the Northwest Passage. Nunavut, Canada, August 2010

Hanne & Jens Eriksen / Masirah Island, coast and mountains, Oman, August

Bryan and Cherry Alexander / Summer tundra in the North of Ellesmere Island. Nunavut, Canada, 1994.

Patricio Robles Gil / Aerial view of San Jose Island, Baja California, Mexico, April 2008

Patricio Robles Gil / Giant barrel cactus (Ferocactus diguetii) in flower on coast, Catalina Island, Gulf of California, Mexico

Patricio Robles Gil / Giant barrel cactus (Ferocactus diguetii) in flower on coast, Catalina Island, Gulf of California, Mexico

Jouan & Rius / Looking down on Island Lagoon and the dry salt lake, South Australia, Australia

Jouan & Rius / Looking down on Island Lagoon and the dry salt lake, South Australia

Robert Valentic / Chappell Island tiger snake {Notechis ater serventyi} sub-adult male basking on dunes, Mount Chappell Island, Bass Strait, Tasmania, Australia

Jack Dykinga / A view across Bartolome Island and Pinnacle Rock, with Santiago Island in the background, Galapagos

Fabio Liverani / Barranco de Tirajana, Gran Canaria Island, the Canary Isles, Spain, September 2007

Fabio Liverani / Barranco de Tirajana, Gran Canaria Island, the Canary Isles, Spain, September 2007

Fabio Liverani / Barranco de Tirajana, Gran Canaria Island, the Canary Isles, Spain, September 2007

Fabio Liverani / Barranco de Tirajana, Gran Canaria Island, the Canary Isles, Spain, September 2007

Fabio Liverani / Scrubby land in the Barranco de Tirajana, Gran Canaria Island, the Canary Isles, Spain, September 2007

Fabio Liverani / Barranco de Tirajana, Gran Canaria Island, the Canary Isles, Spain, September 2007

Kirkendall-Spring / Morris Island Light House near Folly Beach, Atlantic Ocean, South Carolina, USA

Hanne & Jens Eriksen / Socotran desert rose {Adenium obesum sokotranum} flowering, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Socotran desert rose {Adenium obesum sokotranum} flowering in desert, Dieksum, Socotra Island, Yemen

Hanne & Jens Eriksen / Dragon's blood tree {Dracaena cinnabari} Dieksum, Socotra Island, Yemen

Pete Oxford / Sand dunes with Prickly Couch grass (Zoysia macrantha) growing on the beach, North Stradbroke Island off Queensland coast, Australia

Pete Oxford / Sand dunes with Knobby Club-rush (Isolepis nodosa) growing on the beach, North Stradbroke Island off Queensland coast, Australia

Pete Oxford / Sand dunes with Knobby Club-rush (Isolepis nodosa) growing on the beach, North Stradbroke Island off Queensland coast, Australia

Matthew Maran / Cactus Island, Salar de Uyuni (salt flats) circuit, Altiplano, Bolivia

Jack Dykinga / Solitary Cadon cactus (Pachycereus pringlei) growing in scree next to the Sea of Cortes, sunrise, Isla Angel de la Guarda / Archangle Island, Baja California, Mexico

RHONDA KLEVANSKY / Cacti on Inkawasi Island, Salar de Uyuni, Uyuni salt flats, Bolivia, South America

Pete Oxford / Seychelles skink {Mabuya schellensis}, Aride Island, Seychelles

Chris Gomersall / Lesser noddy {Anous teniurostris} pair on nest, Aride Island, Seychelles

Mike Potts / Cordon cactus {Pachycereus pringlei} Guardian Angel Island, Gulf of California, Baja, Mexico

Mike Potts / Blue footed boobies {Sula nebouxii} nesting beside large cactus, San Pedro Matir Island, Gulf of California, Baja, Mexico

Mark Flowers / Traditional building for collecting water and temporary farmhouse at date palm oasis, Queshm Island, Iran

Pete Oxford / Surf bay with mine warning sign. East Falkland Island, Falkland Islands

Pete Oxford / Surf bay with mine warning sign. East Falkland Island, Falkland Islands War

Pete Oxford / Surf bay with mine warning sign. East Falkland Island, Falkland Islands. War

Pete Oxford / Sand dunes at Yorke Bay, East Falkland Island.

Pete Oxford / Baobab tree {Adonsonia digitata} Kubu island, Sua salt pan Makgadikgadi, Botswana

Roberto Rinaldi / A local sailing boat (dhow) with sand dunes behind, Benguerra Island (the second largest island in the Bazaruto archipelago), Mozambique

Eric Baccega / Memorial for Lieutenant Bellot, who disappeared in 1853 while searching for Sir John Franklin Expedition. Beechey Island close to Devon Island, Nunavut, Canada, August 2010

Eric Baccega / Dundas Harbour, Devon Island, Nunavut, Canada, August 2010

Pete Oxford / Western end of Surf Bay, East Falkland Island

Roland Seitre / Bronze-eyed gecko (Ailuronyx seychellensis) resting on tree trunk, Aride Island, Seychelles.

Roland Seitre / Two White terns (Gygis alba) perched on branch, Aride Island, Seychelles.

Roland Seitre / Great frigate bird (Fregata minor) in flight over the ocean, Aride Island, Seychelles, Indian Ocean.

Roland Seitre / Fish poison tree (Barringtonia asiatica) flower, Aride Island, Seychelles.

Roland Seitre / Bronze-eyed gecko (Ailuronyx seychellensis) resting on rocks, Aride Island, Seychelles.

Roland Seitre / Forest vegetation, Aride Island Nature Reserve, Seychelles. April, 2022.

Roland Seitre / White-tailed tropic bird (Phaethon lepturus) sitting on nest at base of a tree, Aride Island, Seychelles.

Roland Seitre / Bronze-eyed gecko (Ailuronyx seychellensis) portrait, Aride Island, Seychelles.

Roland Seitre / Bronze-eyed gecko (Ailuronyx seychellensis) resting on tree trunk guarding its egg, Aride Island, Seychelles.