Franco Banfi / Albacore tuna (Thunnus alalunga), Formigas Islet dive site, Azores, Atlantic Ocean

Franco Banfi / Atlantic spotted dolphins (Stenella frontalis) pod diving, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Franco Banfi / Atlantic spotted dolphins (Stenella frontalis) pod near the surface, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Franco Banfi / Atlantic spotted dolphins (Stenella frontalis) pod diving, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Franco Banfi / Atlantic spotted dolphins (Stenella frontalis) pod playing and diving, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Franco Banfi / Blue jack mackerel, (Trachurus picturatus) baitball, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Franco Banfi / Giant manta ray (Manta birostris) and two Devilrays (Mobula tarapacana), Formigas Islet dive site, Azores, Atlantic Ocean

Franco Banfi / Dusky grouper (Epinephelus marginatus) close up of face, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean.

Franco Banfi / Dusky grouper (Epinephelus marginatus) close up, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Franco Banfi / Dusky grouper (Epinephelus marginatus), Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Franco Banfi / Small lighthouse at Formigas Islet, Azores, Portugal, Atlantic Ocean, August 2014.

Franco Banfi / Group of Scuba divers on a zodiac RIB, Santa Maria Small lighthous at Formigas Islet, Azores, Portugal, Atlantic Ocean, October 2012.

Franco Banfi / Small lighthouse at Formigas Islet, Azores, Portugal, Atlantic Ocean, September 2012.

Franco Banfi / Small lighthouse at Formigas Islet, Azores, Portugal, Atlantic Ocean, September 2012.

Franco Banfi / Scuba diver exploring rocks formations, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Roger Powell / Eurasian oystercatchers (Haematopus ostralegus) resting on islet, Molwerk, Texel Island, The Netherlands.

Roger Powell / Eurasian oystercatchers (Haematopus ostralegus) resting on islet, Molwerk, Texel Island, The Netherlands.

Ross Hoddinott / Galapagos sea lion (Zalophus californianus) resting on sand, with flipper on face, Mosquera Islet, Galapagos Islands, Ecuador.

Ross Hoddinott / Galapagos sea lions (Zalophus californianus) two interacting on sand, Mosquera Islet, Galapagos Islands, Ecuador. May.

Ross Hoddinott / Galapagos sea lion (Zalophus californianus) resting on sand, Mosquera Islet, Galapagos Islands, Ecuador.

Ross Hoddinott / Galapagos sea lion (Zalophus californianus) resting on sand after sunset, Mosquera Islet, Galapagos Islands, Ecuador.

Juergen Freund / Flock of Crested terns (Sterna bergii) on the sand bar of Bird Islet, Tubbataha Reefs, Sulu Sea, Philippines.

Juergen Freund / Flock of Crested terns (Sterna bergii) on the sand bar of Bird Islet, Tubbataha Reefs, Sulu Sea, Philippines.

Juergen Freund / Red-footed boobies (Sula sula) group roosting at twilight, Bird Islet, Tubbataha Reefs, Sulu Sea, Philippines.

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) pups, Champion Islet, Floreana Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) pup, Champion Islet, Floreana Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) mother and pup, Champion Islet, Floreana Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) juveniles, Champion Islet, Floreana Island, Galapagos Islands, Ecuador

Tui De Roy / Charles Mockingbird (Nesomimus trifasciatus), Champion Islet, Floreana Island, Galapagos Islands, Ecuador

Tui De Roy / Charles Mockingbird (Nesomimus trifasciatus) pair courting, Champion Islet, Floreana Island, Galapagos Islands, Ecuador

Tui De Roy / Charles Mockingbird (Nesomimus trifasciatus) pair courting, Champion Islet, Floreana Island, Galapagos Islands, Ecuador

Onne van der Wal / View along Haslewood Island beach with Martin Islet, Whitsundays, Queensland, Australia. November 2012.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) swimming upwards, Sombrero Chino Islet, Santiago Island, Galapagos, Ecuador, May.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) diving to feed on algae, Sombrero Chino Islet, Santiago Island, Galapagos, Ecuador, May.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) diving to feed on algae, Sombrero Chino Islet, Santiago Island, Galapagos, Ecuador, May.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) diving to feed on algae, Sombrero Chino Islet, Santiago Island, Galapagos, Ecuador, May.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) swimming, Champion Islet, near Floreana, Galapagos, Ecuador, May.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) playing underwater, Champion Islet, near Floreana, Galapagos, Ecuador, May.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) playing underwater, Champion Islet, near Floreana, Galapagos, Ecuador, May.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) playing underwater, Champion Islet, near Floreana, Galapagos, Ecuador, May.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) playing underwater, Champion Islet, near Floreana, Galapagos, Ecuador, May.

Enrique Lopez-Tapia / Rocky islet with lower half eroded by the sea, Ile des Pins (Pine Island), New Caledonia, September 2008.

Ernie Janes / Limestone stack Ko Tapu Islet in front of Khao Phing Kan Island, Ao Phang Nga National Park, Phang Nga Province, Thailand, December 2011.

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) family on beach, Mosquera Islet, Ecuador

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki), Mosquera Islet, Ecuador

Roland Seitre / Fayawa Islet / Ilot Fayawa, Mouli, Ouvea, Loyalty Islands Province, New Caledonia.

Roland Seitre / Amedee islet and lighthouse, Noumea, South Province, New Caledonia.

Roland Seitre / View of lagoon from the lighthouse, Amedee Islet / Ilot Amedee, Noumea, South Province, New Caledonia.

Roland Seitre / Lighthouse, Amedee Islet / Ilot Amedee, Noumea, South Province, New Caledonia.

Roland Seitre / Lighthouse and palm tree, Amedee Islet / Ilot Amedee, Noumea, South Province, New Caledonia.

Roland Seitre / Lighthouse, Amedee Islet / Ilot Amedee, Noumea, South Province, New Caledonia.

Roland Seitre / Islet off Houailou, North Province, New Caledonia.

Roland Seitre / Islet off Houailou with Cook Pines (Araucaria columnaris) and Poro mines. North Province, New Caledonia, August 2012.

Roland Seitre / Banded Sea Krait (Laticauda saintgironsi) on beach, Amedee Islet / Ilot Amde, Noumea, South Province, New Caledonia.

Roland Seitre / Banded Sea Krait (Laticauda saintgironsi) coiled up, Amedee Islet / Ilot Amde, Noumea, South Province, New Caledonia.

Roland Seitre / Banded Sea Kraits (Laticauda saintgironsi) coiled up together, Amedee Islet / Ilot Amde, Noumea, South Province, New Caledonia.

Roland Seitre / Yellowfin goatfish (Mulloidichthys vanicolensis) shoal, Amedee Islet / Ilot Amde, Noumea, South Province, New Caledonia.

Christophe Courteau / Young red lechwes on an islet {Kobus leche}. Rainy season, Okavango Delta, Botswana.

Kerstin Hinze / Aerial view of Flaeskholm, islet in the Baltic Sea, Denmark, July 2012

Claudio Contreras / Sally Lightfoot Crab (Grapsus grapsus) feeding on caught fish. San Juanito Islet, Islas Marias Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, October.

Roland Seitre / Aerial view of a forest islet in the Llanos de Moxos, a natural roosting site for the Critically endangered Blue throated macaw (Ara glaucogularis), Estancia Tacuaral, Santa Ana del Yacuma, Beni, Boli...

Roland Seitre / Forest islet in the Beni prairie, natural habitat of the Critically endangered Blue throated / Wagler's macaw (Ara glaucogularis) Estancia Tacuaral, Santa Ana del Yacuma, Beni, Bolivia, July 2008

Pete Oxford / Galapagos penguin (Spheniscus mendiculus) chick resting within a lava tube, Mariela Islet, Isabela Island, Galapagos, endemic.

George Sanker / Sandhill Crane (Grus canadensis) breeding pair with two small chicks on river islet. Yellowstone National Park, Wyoming, USA, June.

Juergen Freund / Red-footed booby (Sula sula) chick, Bird Islet, Tubbataha Reefs, Sula Sula Sea, Philippines.

Juergen Freund / Red-footed boobies (Sula sula) gathering to roost at dusk, Bird Islet, Tubbataha Reef, Sula Sula sea, Philippines, April 2009

Juergen Freund / Red-footed booby (Sula sula) adult beside nest with chick, Bird Islet, Tubbataha Reefs, Sula Sula sea, Philippines, April 2009.

Juergen Freund / Red-footed booby (Sula sula) perched, Bird Islet, Tubbataha Reefs, Sula Sula sea, Philippines, April 2009.

Juergen Freund / Red-footed boobies (Sula sula) brown and white morphs perched in tree, Bird Islet, Tubbataha Reefs, Philippines, April.

Juergen Freund / Red-footed boobies (Sula sula) brown and white morphs perched in tree, Bird Islet, Tubbataha Reefs, Philippines, April.

Mark Taylor / Ko Tapu limestone pinnacle islet. Phang Nga Bay, Thailand, December 2010.

Mark Taylor / Ko Tapu limestone pinnacle islet. Phang Nga Bay, Thailand, December 2010.

Oriol Alamany / Ngarau Mata petroglyphs representing Tangata Manu or Bird-Man in the ceremonial village of Orongo, on the volcano Rano Kau, Motu Nui islet with Motu Iti and Motu Kao Kao in the background, Easter Isl...

Tim Laman / Flock of Terns (Sterinae) resting on a sand islet near Kri Island in the Raja Ampat Islands, Indonesia, May 2007

Tim Laman / Terns (Sterninae) and a Reef Heron rest on a sand islet near Kri Island in the Raja Ampat Islands, Indonesia, May 2007

Claudio Contreras / Black-vented Shearwater (Puffinus opisthomelas) head portrait lying against rock, Negro Islet, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Claudio Contreras / Black-vented Shearwater (Puffinus opisthomelas) head portrait lying against rock, Negro Islet, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Philippe Clement / Panoramic view of Eilean na Moine islet covered with Scots Pines (Pinus sylvestris) in Loch Eilt along the Road to the Isles, Highlands, Scotland, UK, May 2010

Alex Hyde / Common seals (Phoca vitulina) lying down on seaweed covered islet in loch. Isle of Mull, Scotland, June 2010.

Miles Barton / Wall lizard (Podarcis lilfordi) on Dead Horse Arum (Helicodiceros / Dracunculus muscivorus) flower, Aire Islet, Menorca, April The arum attracts insects by producing a carrion-like smell and luring t...

Miles Barton / Dead Horse Arum (Helicodiceros / Dracunculus muscivorus) flower, Aire Islet, Menorca / Minorca, April

Oriol Alamany / Giant moai statues in Ahu Tongariki at sunset, with Poike cliffs and Motu Marotiri islet in the background, Easter Island, Pacific ocean, November 2004

Oriol Alamany / The islet of Motu Kao Kao at dusk, located off the coast of Easter Island near Orongo, Easter Island, Pacific ocean, November 2004

Chris Gomersall / Common / Harbour seal (Phoca vitulina) on rocky islet, South Uist, Outer Hebrides, Scotland

Tim Laman / Small mangrove islet and an individual Red mangrove tree {Rhizophora mangle} getting established in the shallows of mangrove lagoon, Tunicate Cove, Belize.

Tim Laman / Swallow-tailed gull (Creagrus furcatus) flying. Champion Islet off Floreana (Charles) Island, Galapagos Islands.

Tim Laman / Floreana (Charles) mockingbird (Nesomimus trifasciatus). Champion Islet off Floreana (Charles) Island, Galapagos Islands. Endangered

Tim Laman / Brown pelican (Pelecanus occidentalis) subadult flying. Champion Islet off Floreana (Charles) Island, Galapagos Islands.

Tim Laman / Sleeping Galapagos sea lion (Zalophus californianus wollebaeki) and cub, moulting. Champion Islet off Floreana (Charles) Island, Galapagos Islands.

Tim Laman / A sleeping Galapagos sea lion (Zalophus californianus wollebaeki) moulting, and a Galapagos yellow warbler (Dendroica petechia aureola) pecking at the sea lion's skin. Champion Islet off Floreana (Cha...

Tim Laman / Giant prickly pear cactus (Opuntia sp.) growing on Champion Islet off Floreana (Charles) Island, Galapagos Islands.

Tim Laman / Sleeping Galapagos sea lion (Zalophus californianus wollebaeki) and cub, moulting, and a Galapagos yellow warbler (Dendroica petechia aureola). Champion Islet off Floreana (Charles) Island, Galapagos...

Tim Laman / Swallow-tailed gull (Creagrus furcatus) roosting. Champion Islet off Floreana (Charles) Island, Galapagos Islands.

Tim Laman / Sooty Tern (Onychoprion fuscatus) on nest with egg at nesting colony, Teuaua Islet,off Ua Huka Island, Marquesas Islands, French Polynesia.

Tim Laman / An egg collector from Ua Huka Island collects Sooty Tern eggs in a bucket for food while Sooty Terns (Onychoprion fuscatus) hover over their nesting colony on Teuaua Islet, from Ua Huka Island, Marque...

Tim Laman / Egg collectors from Ua Huka Island load a boat with buckets of Sooty Tern eggs collected for food from Sooty Terns (Onychoprion fuscatus) nesting colony on Teuaua Islet off from Ua Huka Island, Marque...