Gavin Hellier / Giant monolithic stone Maoi statues at Rano Raraku, Easter Island, Rapa Nui, Chile, South America 2008

Gavin Hellier / Anakena beach, monolithic giant stone Moai statues of Ahu Nau Nau, four of which have topknots, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Oriol Alamany / Moai face at the restored archaeological site of Ahu Ko Te Riku in Tahai Ceremonial Center in Hanga Roa, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Rock paintings of Terns (Sterna sp) at Ana Kai Tangata cave, Easter Island (Pascua or Rapa Nui), Pacific Island, Unesco World Heritage Site, November 2004

Oriol Alamany / Four giant Moai statues in Ahu Nau Nau, Anakena beach, Easter Island Pacific ocean, November 2004

Oriol Alamany / Rano Kau Volcano crater with lagoon and Motu islets in the sea, Easter Island, Pacific ocean, November 2004

Oriol Alamany / Silhouette of Moai statue at dawn in Ahu Ko Te Riku, restored archaeological site of Ahu Tahai, Hanga Roa, Easter Island, Pacific ocean, November 2004

Oriol Alamany / Moai stone statue at dusk on the slopes of the quarry at Rano Raraku volcano, Easter Island Pacific ocean, November 2004

Doug Allan / Close up of two stone sculptures / Moai at Ahu Ahivi/Ahu Akivi , Easter Island, South PacificMoai October 2009

Eric Sohn Joo Tan/ BIA / Scaly-breasted Partridge (Arborophila chloropus), Bidoup Nui Ba National Park, Vietnam

Eric Sohn Joo Tan/ BIA / Tickell's Blue-Flycatcher (Cyornis tickelliae) female, Bidoup Nui Ba National Park, Vietnam

Eric Sohn Joo Tan/ BIA / Large Niltava (Niltava grandis) female, Bidoup Nui Ba National Park, Vietnam

Eric Sohn Joo Tan/ BIA / Slaty-bellied Tesia (Tesia olivea), Bidoup Nui Ba National Park, Vietnam

Eric Sohn Joo Tan/ BIA / Collared Laughingthrush (Garrulax yersini), Bidoup Nui Ba National Park, Vietnam

David Fleetham / Woman with snorkel equipment walking along water's edge. Kawakiu Nui Beach, West End, Molokai, Hawaii. July 2017. Model released.

David Fleetham / Kawakiu Nui Beach on West End, Molokai, Hawaii. July 2017.

Shane P. White / Moai statues, Ahu Tongariki, Easter Island, Chile

Shane P. White / Moai statue, Ahu Tongariki, Easter Island, Chile

Shane P. White / Moai statues, Ahu Tongariki, Easter Island, Chile

Shane P. White / Moai statue, Ahu Tongariki, Easter Island, Chile

Agustin Esmoris / Moai statue, Rano Raraku, Easter Island, Chile

Agustin Esmoris / Moai statue, Rano Raraku, Easter Island, Chile

Kristel Richard / Wild Rapa Nui horse / stallion and his mare, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / Two wild Rapa Nui horses/mares, two fillies and a colt drinking, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / Headshot of three wild Rapa Nui horses/mares, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / Wild Rapa Nui horse / stallion, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / Wild Rapa Nui horse / stallion, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / Wild Rapa Nui horse / colt, near Ahu Tongariki, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / Band of wild Rapa Nui horses/colts, walking near Easter island heads on Ahu Tongariki , Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / Band of wild Rapa Nui horses/mares and a colt, walking near Rapa Nui National Park UNESCO World Heritage Site, Easter Island Heads, Ahu Tongariki, Rapa Nui National Park UNESCO World Heritage Site, Ea...

Kristel Richard / A wild Rapa Nui horse / stallion and his mare, filly and colt, standing near the sea, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Kristel Richard / A wild Rapa Nui horse / colt, standing near the sea, Rapa Nui National Park UNESCO World Heritage Site, Easter Island / Rapa Nui, Chile.

Julian Hume / Illustration of extinct birds : Maui nui finch (Telespiza ypsilon) plucking feather down from a moulting Maui Nui Moa-nalo (Thambetochen chauliodous) for use as nesting material. Hawaii.

Julian Hume / Illustration of extinct Maui Nui Gaper (Aidemedia lutetiae) foraging in moss-covered bark searching for invertebrates. Hawaii.

Julian Hume / Illustration of extinct Makawehi finch (Telespiza persecutrix) (right) with Laysan finch (Telespiza cantans) (left) and Maui nui finch (Telespiza ypsilon) (centre) on Moloka'i, Hawaii.

Julian Hume / Scaled head studies of extinct Hawaiian Geese compared with Nene (Branta sandvicensis) (centre). Clockwise from top left: Giant hawaiian goose (Branta sp), Maui nui moa-nalo (Thambetochen chauliodous)...

Julian Hume / Illustration of the extinct Straight-billed gaper (Aidemedia lutetiae) feeding young in a coastal forest on O'ahu, with a geometrid moth (Scotorythra oxyphractis)

Julian Hume / Illustration of extinct birds : Maui nui moa-nalo (Thambetochen chauliodous) female protecting its young from an attacking Hawaiian eagle (Haliaeetus albicilla). The plant in the foreground is the ext...

Julian Hume / Illustration of extinct Straight-billed gaper (Aidemedia lutetiae) feeding young in a coastal forest on O'ahu, with a geometrid moth (Scotorythra oxyphractis)

Andy Trowbridge / Whirinaki river, Te Whaiti Nui A Toi canyon. Whirinaki forest park, Whakatane district, Bay of Plenty Region, New Zealand.

Gavin Hellier / Portrait of Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue at night Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Profile of a lone monolithic giant stone Moai statue at Tongariki, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Woman looking at the giant stone Moai statues of Ahu Nau Nau on Anakena beach, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Woman looking at the giant stone Moai statues of Ahu Nau Nau on Anakena beach, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Woman looking at the giant stone Moai statues of Ahu Nau Nau on Anakena beach, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island at night, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island at dusk, Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Giant monolithic stone Maoi statues at Rano Raraku, Easter Island, Rapa Nui, Chile, South America 2008

Gavin Hellier / Giant stone Moai statues of Ahu Nau Nau on Anakena beach, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Giant monolithic stone Maoi statue at Rano Raraku, Isla de Pascua / Easter Island, Rapa Nui, Chile, 2008

Gavin Hellier / Ahu Tongariki, the largest ahu on the Island, Tongariki is a row of 15 giant stone Moai statues, Isla de Pascua / Easter Island, Rapa Nui, Chile, 2008

Gavin Hellier / Ahu Tongariki, the largest ahu on the Island, Tongariki is a row of 15 giant stone Moai statues, Isla de Pascua / Easter Island, Rapa Nui, Chile, 2008

Gavin Hellier / Ahu Tongariki, the largest ahu on the Island, Tongariki is a row of 15 giant stone Moai statues, Isla de Pascua / Easter Island, Rapa Nui, Chile, 2008

Gavin Hellier / View from the rim into the crater of Ranu Kau, Isla de Pascua / Easter Island, Rapa Nui, Chile, 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, illuminated at sunrise, Isla de Pascua, Rapa Nui, Chile, 2008

Gavin Hellier / Anakena beach, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Ahu Tongariki, the largest ahu on the Island, Tongariki is a row of 15 giant stone Moai statues, Isla de Pascua / Easter Island, Rapa Nui, Chile 2008

Gavin Hellier / Ahu Tongariki, the largest ahu on the Island, one of the Tongariki row of 15 giant Moai statues, only this one still has a topknot in place, Isla de Pascua / Easter Island, Rapa Nui, Chile, 2008

Gavin Hellier / Moai statue Ahu Ko Te riku, the only topknotted and eyeballed Moai on the Island, Rapa Nui, Easter Island, Chile, 2008

Gavin Hellier / Giant monolithic stone Moai statues at Rano Raraku, Rapa Nui, Easter Island, Chile, 2008

Brent Stephenson / Restored houses at the stone village at Orongo. Easter Island, October 2009.

Brent Stephenson / The seven Moai at Ahu Akivi that stand with their backs to the sea. Easter Island, October 2009.

Brent Stephenson / The crater lake of the extinct volcano Rano Kau on the southwestern part of Easter Island. South Pacific, October 2009.

Brent Stephenson / The fifteen Moai at Ahu Tongariki that stand facing the sea. Easter Island, October 2009.

Brent Stephenson / Chilean Tinamou (Nothoprocta perdicaria) in a cultivated field. Near Akivi, Easter Island, October.

Brent Stephenson / The lone Moai standing aside from the main group at Ahu Tongariki with the quarry at Rano Raraku in the background. Easter Island, October 2009.

Oriol Alamany / Common Diuca-Finch (Diuca diuca) perched on rock, Easter Island (Pascua or Rapa Nui), October

Oriol Alamany / American Cockroach (Periplaneta americana) at night, Hanga Roa, Easter Island (Pascua or Rapa Nui) Pacific

Oriol Alamany / Moais at dusk on the slopes of Rano Raraku, which was the quarry for all the carved moai, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Giant moai statues stand erect at sunrise in Ahu Tongariki, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Giant moai statues stand erect at sunrise in Ahu Tongariki, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Petroglyphs representing a Tangata Manu (Bird Man) at Papa Tataku Poki, near Tongariki, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Woman with a 4WD car on open grassland, Poike peninsula, Easter Island (Pascua / Rapa Nui) Unesco World Heritage Site, November 2004

Oriol Alamany / Manavai (stones surrounding a culture) with Taro plant (Colocasia esculenta), Hanga Ho'onu / La Perouse bay, Easter Island / Rapa Nui, Unesco World Heritage Site, November 2004

Oriol Alamany / Horses grazing (Equus caballus) and Chilean Palms (Jubaea chilensis) at Anakena beach, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Chilean palm trees (Jubaea chilensis) on Anakena beach, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / The Pacific Ocean at Anakena beach, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Chilean Palm tree (Jubaea chilensis) on Anakena beach, Easter Island (Pascua / Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Two Ox (Bos taurus) grazing tied togetheron Rano Kau Volcano slopes, Easter Island (Pascua / Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Lagoon at the crater of Rano Kau Volcano, Easter Island (Pascua / Rapa Nui), Unesco World Heritage Site, November 2004

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...

Oriol Alamany / Horse (Equus caballus) and tree silhouetted against the Pacific Ocean in the Northwest coast of Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Moai face at the restored archaeological site of Ahu Ko Te Riku in Tahai Ceremonial Center in Hanga Roa, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Moai statue standing erect at the restored archaeological site of Ahu Ko Te Riku in Hanga Roa, Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Moai statues stand erect at the restored archaeological sites of Ahu Vai Uri and Ahu Tahai in Hanga Roa, Easter Island (Pascua / Rapa Nui), Unesco World Heritage Site, November 2004

Oriol Alamany / Rano Kau Volcano crater, Easter Island, Pacific ocean, November 2004

Oriol Alamany / Rocks formed from lava flows on the southwest coast of Easter Island Pacific ocean, November 2004

Oriol Alamany / Rocks formed from lava flows on the southwest coast of Easter Island , Pacific ocean, November 2004

Oriol Alamany / Fallen Moai statue, Ahu Akahanga, South Coast, Easter Island , Pacific ocean, November 2004

Oriol Alamany / Giant moai statue in Ahu Tongariki with Poike Peninsula in the background, Easter Island, Pacific ocean, November 2004