Merryn Thomas / Pebble beach at Playa de las Americas, Tenerife, Canary Islands, April 2011.
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Nick Upton / Sand-loving wasp / Square-headed wasp (Tachytes panzeri / Tachytes europaeus) resting on beach pebble, Samos, Greece, August.
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Philippe Clement / Chalk cliffs rising up from pebble beach at Sotteville-sur-Mer. Normandy, France, October 2010.
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Philippe Clement / Pebble beach and chalk cliffs at Veulettes-sur-Mer. Normandy, France, October 2010.
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Fergus Gill / Ringed plover (Charadrius hiaticula) on a pebble beach. Isle of Barra, Scotland, July .
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Fergus Gill / Ringed plover (Charadrius hiaticula) on a pebble beach. Isle of Barra, Scotland, July .
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Alan Williams / Snow Bunting (Plectrophenax nivalis) male on pebble beach in winter, North Wales Coast, UK, March
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Alan Williams / Snow Bunting (Plectrophenax nivalis) female on pebble beach in winter, North Wales Coast, UK, March
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Nick Garbutt / RF- King Penguins (Aptenodytes patagonicus) walking along the beach at Salisbury Plain, South Georgia, South Atlantic. January. (This image may be licensed either as rights managed or royalty free.)
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Toby Roxburgh / Coral rubble on a beach in Cancun, Mexico, 2006.
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David Woodfall / Pebble beach fringing saltmarsh Bridgewater Bay NNR Severn Estuary Somerset, England, August 2009
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David Woodfall / Pebble beach fringing saltmarsh Bridgewater Bay NNR Severn Estuary Somerset, England, August 2009