Floris van Breugel / Sand dunes reflecting pink and orange glowing colours from the sky at sunset. Death Valley National Park, California, USA. November 2009. Highly Commended in the Veolia Environnement Wildlife Photoga...

Fabio Pupin / Peringuey's desert adder, (Bitis peringueyi), sidewinding on dune, Namib desert, Namibia, February . Non-ex.

Theo Bosboom / Blue hour before sunrise over the dunes of Seilebost beach, Isle of Harris, Hebrides, Scotland. February 2018.

David Woodfall / Cheviot sheep grazing eroding machair at front of sand dunes, North Uist, Scotland, UK, June.

David Woodfall / Little tern (Sterna albifrons ) feeding sand eel (Hyperoplus spp) to young chick. Gronant Dunes, Denbighshire, Wales, UK, June.

Ross Hoddinott / Sand dunes, marram grass (Ammophila arenaria) and beach at sunrise, Luskentyre, Isle of Harris, Scotland, UK. October 2018

Enrique Lopez-Tapia / Tourists riding Bactrian camels (Camelus bactrianus) in sand dunes, Nubra Valley. Ladakh, India, September 2018.

Enrique Lopez-Tapia / Man leading Bactrian camels (Camelus bactrianus) in sand dunes, Nubra Valley. Ladakh,,India, September 2018.

Shane P. White / Freshwater lagoons amid sand dunes, Lencois Maranhenses National Park, Brazil

Guy Edwardes / Sand dunes at Luskentyre with view to Taransay. Isle of Harris, Outer Hebrides, Scotland, UK. November 2016.

Jack Dykinga / Rainbow over petrified sand dunes at sunset, Vermilion Cliffs National Monument, Paria Canyon-Vermilion Cliffs Wilderness, Arizona, USA.

Jack Dykinga / Petrified sand dunes at sunrise with rain-filled 'pot holes' and banded sandstone in foreground. Vermilion Cliffs National Monument,Paria Canyon-Vermilion Cliffs Wilderness, Arizona, USA.

Dave Bevan / Grey seal (Halichoerus grypus) pup sheltering amongst sand dunes and Maram grass (Ammophila) whilst its mother is away feeding, Norfolk, England, UK. December.

Ingo Arndt / Sossusvlei,Namib desert, Namib Naukluft NP, Namibia

Ingo Arndt / Dead trees in Namib desert, Namib Naukluft NP, Namibia

Francois Savigny / Evening light on sand dunes, Sossusvlei NP, Botswana, Southern Africa

Jack Dykinga / Dead Vlei, with dessicated 900 year old trees standing in the salt pan surrounded by towering red sand dunes. Namib-Naukluft National Park, Namibia. June 2013.

Jack Dykinga / Dead Vlei, with dessicated 900 year old trees standing in the salt pan surrounded by towering red sand dunes. Namib-Naukluft National Park, Namibia. June 2013.

Jack Dykinga / Dead Vlei, with dessicated 900 year old trees standing in the salt pan surrounded by towering red sand dunes. Namib-Naukluft National Park, Namibia. June 2013.

Jack Dykinga / Deadvlei, with dessicated 900 year old trees standing in the salt pan surrounded by towering red sand dunes. Namib-Naukluft National Park, Namibia. June 2013.

Jack Dykinga / Sossusvlei World Heritage Site, with curving red sand dunes and acacia trees. Namib-Naukluft National Park, Namibia. June 2013.

Jack Dykinga / Sossusvlei World Heritage Site, with curving red sand dunes and Acacia trees. Namib-Naukluft National Park, Namibia. June 2013.

Jack Dykinga / Deadvlei, with dessicated 900 year old trees standing in the salt pan surrounded by towering red sand dunes. Namib-Naukluft National Park, Namibia. June 2013.

SCOTLAND: The Big Picture / View across Sound of Taransay to North Harris hills in stormy weather , West Harris, Outer Hebrides, Scotland, UK, September 2014.

Yashpal Rathore / Demoiselle crane (Anthropoides virgo) resting on sand dunes during winter migration, Khichan, Western Rajasthan, India. March.

Juan Carlos Munoz / Namib sand snake (Psammophis namibensis) in sand dunes, Swakopmund, Erongo Region, Namibia.

Juan Carlos Munoz / Gemsbok (Oryx gazella) aerial view of herd on sand, Namib Desert, Namibia.

Juan Carlos Munoz / Gemsbok (Oryx gazella) aerial view of herd on sand, Namib Desert, Namibia.

Wim van den Heever / A misty sunrise over tree silhouette in Deadvlei, Namibia

Wim van den Heever / Oryx (Oryx gazella) lone animal standing on the top of a red dune, Sossuvlei, Namibia.

Yva Momatiuk & John Eastcott / Sand dunes and scattered rocks, Death Valley National Park, California

Yva Momatiuk & John Eastcott / Ripples on white gypsum sand dunes, White Sands National Park, New Mexico

Staffan Widstrand / Greater kudu (Tragelaphus strepsiceros) male by sand dunes, St Lucia Wetlands National Park, South Africa

Wim van den Heever / Gemsbok (Oryx gazella) two walking across sand dunes, aerial view. Namibia.

Wim van den Heever / Ancient dead Camelthorn tree (Vachellia erioloba) trees with red dunes, Namib desert, Deadvlei, Sossusvlei, Namibia. August 2015.

Wim van den Heever / Ancient dead Camelthorn tree (Vachellia erioloba) trees with red dunes and mist, Namib desert, Deadvlei, Sossusvlei, Namibia. August 2015.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with red dunes, and star trails, Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with red dunes and the milky way behind, Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) at night with red dunes behind. Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with sand dunes, Namib desert, Deadvlei, Sossusvlei, Namibia.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with sand dunes, Namib desert, Deadvlei, Sossusvlei, Namibia.

Juan Carlos Munoz / Sand dunes with some desert vegetation at base, Namib-Naukluft National Park, Namibia, June 2015.

Inaki Relanzon / Khongor sand dunes, Govi Gurvan Saikhan National Park, Gobi Desert, South Mongolia. June 2015.

Roland Seitre / Dromedary camel (Camelus dromedarius) calf Oriental Great Erg sand dunes, Jbil National Park, Tunisia.

Colin Monteath/ Hedgehog House / Sand dune at sunrise, Simpson Desert, Northern Territory, Australia

Colin Monteath/ Hedgehog House / Spinifex Grass (Spinifex sp) on sand dune with footprints, Simpson Desert, Northern Territory, Australia

Colin Monteath/ Hedgehog House / Parallel sand dunes in desert, Simpson Desert, Northern Territory, Australia

Sergey Gorshkov / Gemsbok (Oryx gazella) in sand dunes, Namibia. Finalist in the Mammals Category of the Wildlife Photographer of the Year Awards (WPOY) Competition 2015.

Bruno D'Amicis / Sand viper (Cerastes vipera) sidewinding on sand dunes. Grand Erg Oriental, Kebili Governorate. Tunisia.

Bruno D'Amicis / Desert monitor (Varanus griseus) moving across sand dunes, showing characteristic tracks, in the Sahara, Tunisia.

Bruno D'Amicis / Fennec fox (Vulpes zerda) adult at night digging for prey among the roots of Retam broom shrub. Grand Erg Oriental, Kebili Governorate, Tunisia. Taken with remote camera trap.

Bruno D'Amicis / Fennec fox (Vulpes zerda) foraging at night, Grand Erg Oriental, Kebili Governorate. Tunisia. Taken with remote camera trap.

Bruno D'Amicis / Fennec fox (Vulpes zerda) adult at night in sand dunes with starry sky, Grand Erg Oriental, Kebili Governorate, Tunisia. Camera trap image

Bruno D'Amicis / Tenebrionid beetle (Tenebrionidae) crossing Fennec fox (Vulpes zerda) tracks on sand. Grand Erg Oriental, Kebili Governorate. Tunisia.

Bruno D'Amicis / Fennec fox (Vulpes zerda) Grand Erg Oriental, Kebili Governorate. Tunisia.

Bruno D'Amicis / Fennec fox (Vulpes zerda) ears above sand dunes, Grand Erg Oriental, Kebili Governorate. Tunisia.

Roland Seitre / Dromedary (Camelus dromedarius) mother and calf in desert, Sahara Desert, Jebil National Park, Tunisia

Roland Seitre / Dromedary (Camelus dromedarius) mother and calfs in desert, Jebil National Park, Sahara Desert, Tunisia

Roland Seitre / Dromedary (Camelus dromedarius) mother and calf in desert, Jebil National Park, Sahara Desert, Tunisia

Roland Seitre / Dromedary (Camelus dromedarius) mother and calf in desert, Jebil National Park, Sahara Desert, Tunisia

Andy Trowbridge / Four Yellow-eyed penguins (Megadyptes antipodes) walking up a sand dune towards their nests, Otago Peninsula, Otago, South Island, New Zealand. September. Endangered Species.

Andy Trowbridge / Yellow-eyed penguin (Megadyptes antipodes) walking up a sand dune towards its nest. Otago Peninsula, Otago, South Island, New Zealand. February. Endangered Species.

Chris Mattison / Sidewinder (Crotalus cerstastes) in sand dunes, Anza-Borrego Desert State Park, California, USA, May.

Hougaard Malan / Acacia tree amongst flowering Tribulus on Kalahari Dune. Kgalagadi Transfrontier Park, Southern Africa. January 2010.

Hougaard Malan / Ostrich (Struthio camelus) pair and chicks on dune in the Kalahari. Kgalagadi Transfrontier Park, Southern Africa, February.

Hougaard Malan / Typical landscape of red dunes, grass and camelthorn trees. Namib Rand, Namibia. May 2010.

Roland Seitre / Arabian Wolf (Canis lupus arabs) on sand dune, native to Middle East

Jouan Rius / Gypsum sand dune at sunset, White Sands National Park, Chihuahuan Desert, New Mexico, USA, December 2012.

Jack Dykinga / White Sands National Park with its white gypsum dunes dotted with Yuccas (Yucca elata) creating patterns amid the dunes, at sunset. White Sands, New Mexico. January 2013

Jack Dykinga / White Sands National Park with its white gypsum dunes dotted with Yuccas (Yucca elata) creating patterns amid the dunes. White Sands, New Mexico, USA. January 2013

David Tipling / Visitors viewing Grey Seal colony at Winterton Dunes, Norfolk, December 2010

Juergen Freund / Paddy melon (Cucumis myriocarpus) growing in red sand dunes of the outback. It is a prostrate or climbing annual herb occurs in southern Africa and is a weed in Australia, South Australia, Australia

Juergen Freund / Aerial of sand dunes of Simpson Desert Regional Reserve. South Australia, June 2011

Juergen Freund / Aerial of Simpson Desert Regional Reserve where lakes amongst the sand dunes. Normally dry, the lakes only have water during a very wet season, South Australia, June 2011

Denis-Huot / Sossusvlei dunes, wind in rainy season, Namib-Naukluft National Park, Namib desert, Namibia, April 2008

Daniel Heuclin / Sand Viper (Cerastes vipera) side winding across sand dunes, near Chingueti, Mauritania

David Noton / Person walking along sand dunes, Namib Desert, Namibia, Southern Africa. Model released.

Jack Dykinga / Sand storm cutting across the Mesquite Sand Dunes in Death Valley National Park, California, USA 2010

Juan Carlos Munoz / Aerial view of the 'Long Wall', sand dunes along the Atlantic coast of the Namib desert, Swakopmund, Namibia, August 2008

Konrad Wothe / Mandara Lakes in the dunes of Ubari, oasis Um el Ma, Libyan desert, Libya, Sahara, North Africa, December 2007

Konrad Wothe / Tuaregs under date Palm at Mandara Lakes, oasis Um el Ma, Libyan desert, Libya, Sahara, North Africa, December 2007. No release available.

Konrad Wothe / Sand dunes in the Libyan desert, Sahara, Libya, North Africa, December 2007

Konrad Wothe / Man standing amongst sand dunes in the Libyan desert, Sahara, Libya, North Africa, December 2007. No release available.

Konrad Wothe / Dromedary camel (Camelus dromedarius) Caravan in the Libyan desert, Sahara, North Africa, December 2007. No release available.

Konrad Wothe / Sand dunes in the Libyan desert, Sahara, Libya, North Africa, December 2007

Konrad Wothe / Fata Morgana, water mirage in the Libyan desert, Libya, North Africa, November 2007

Ernie Janes / Grey seal (Halichoerus grypus) pup resting on sand dune, Norfolk Beach, UK January

Ernie Janes / Old dinghy on saltmarshes, Brancaster, Norfolk, UK, March 2009

Ernie Janes / A person looking out onto the Erg Chebbi Dunes. Sahara Desert, Morocco, North Africa, March 2011.

Ernie Janes / Dromedary Camel (Camelus dromedarius) on Erg Chebbi Dunes. Sahara Desert, Morocco, North Africa, March 2011.

Ernie Janes / Erg Chebbi Dunes, Sahara Desert, Morocco, North Africa, March 2011.

Ernie Janes / Dromedary Camel (Camelus dromedarius) in the Erg Chebbi Dunes. Sahara Desert, Morocco, North Africa, March 2011.

Ernie Janes / Erg Chebbi Dunes, Sahara Desert, Morocco, North Africa, March 2011.

Ernie Janes / Erg Chebbi Dunes, Sahara Desert, Morocco, North Africa, March 2011.

Thomas Rabeil / Desert landscape seen from the air with solitary mountain rising from the sand. Termit Massif, Niger, Africa.