Wild Wonders of Europe / Hamblin / Sand dunes on Agilos Kopa, Nagliai Nature Reserve, Curonian Spit, Lithuania, June 2009

Wild Wonders of Europe / Hamblin / Sand dunes with bird footprints on Agilos Kopa, Nagliai Nature Reserve, Curonian Spit, Lithuania, June 2009

Wild Wonders of Europe / Hamblin / Common cockchafer / Maybug (Melolontha melolontha) stranded on rope jetsom on beach of Curonian Spit, Lithuania, June 2009

Wild Wonders of Europe / Hamblin / Pollen blowing from cones of pine tree, Nagliai Nature Reserve, Curonian Spit, Lithuania, June 2009

Wild Wonders of Europe / Hamblin / Sand dunes on Agilos Kopa, Nagliai Nature Reserve, Curonian Spit, Lithuania, June 2009

Colin Monteath / Hollyford River mouth and sand dune spit at sunset, Martin's Bay, Fiordland National Park, New Zealand

Colin Monteath / Martin's Bay with Mount Tutoko and Darran Mountains behind and sand dune spit, Fiordland National Park, New Zealand

Colin Monteath / Martin's Bay with Mount Tutoko and Darran Mountains behind and sand dune spit, Fiordland National Park, New Zealand

Wild Wonders of Europe / Cairns / Aerial of a European elk / Moose (Alces alces) crossing sand spit in the Rapadalen valley, Sarek National Park, Laponia World Heritage Site, Lapland, Sweden, September 2008 WWE BOOK.

Roger Powell / Flock of Curlew (Numenius arquata) with a few Redshank (Tringa totanus) resting on a sand spit. Cresswell, Northumberland, UK

Doug Perrine / Whale shark {Rhincodon typus} circles a spawning aggregation of Dog snapper fish {Lutjanus jocu} just before sunset, waiting to filter feed on the fish eggs after the snappers spawn; Gladden Spit, Bel...

Doug Perrine / Whale shark {Rhincodon typus} swims amongst spawning Mutton snappers {Lutjanus analis} Gladden Spit and Silk Cayes Marine Reserve, Belize, Central America, Caribbean Sea

Doug Perrine / Whale shark {Rhincodon typus} circles a spawning aggregation of Dog snapper fish {Lutjanus jocu} just before sunset, waiting to filter feed on the fish eggs after the snappers spawn; Gladden Spit, Bel...

Doug Perrine / Whale shark {Rhincodon typus} rises out of spawning aggregation of Mutton snappers, past divers, Gladden Spit and Silk Cayes Marine Reserve, Belize, Central America, Caribbean Sea

Doug Perrine / Whale shark {Rhincodon typus} circles a spawning aggregation of Dog snapper fish {Lutjanus jocu} just before sunset, waiting to filter feed on the fish eggs after the snappers spawn; Gladden Spit, Bel...

Doug Perrine / Whale shark {Rhincodon typus} circles a spawning aggregation of Dog snapper fish {Lutjanus jocu} just before sunset, waiting to filter feed on the fish eggs after the snappers spawn; a small puff of s...

Steven Kazlowski / Polar bear (Ursus maritimus) female with young cub curious to check out the photographer and play in the water along Bernard Spit during summer, off Barter Island, Arctic National Wildlife Refuge, Ala...

Steven Kazlowski / Polar bear (Ursus maritimus) female with cub along Bernard Spit, waiting for autumn freeze up so they can head out onto the ice to hunt, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) footprints or tracks along a beach on Bernard Spit, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) female with cub on Bernard Spit, waiting for autumn freeze up so they can head out onto the ice to hunt, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) footprints / tracks along a beach on Bernard Spit, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) footprints or tracks along a beach on Bernard Spit, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) footprint / track on Bernard Spit, a barrier island off the Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) two large males walking along Bernard Spit, as they wait for the autumn freeze up so they can head out onto the sea ice to hunt, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) large adult male yawns displaying discomfort or a warning to stay away, Bernard Spit, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) two large males resting on Bernard Spit, as they wait for the autumn freeze up so they can head out onto the sea ice to hunt, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) large male walks along Bernard Spit, as it waits for the autumn freeze up so he can head out onto the sea ice to hunt, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) large adult walking along a barrier island, Bernard Spit, waiting for the autumn freeze up so it can head out onto the sea ice to hunt, Arctic National Wildlife Refuge, Al...

Steven Kazlowski / Polar bear (Ursus maritimus) female walking on a barrier island at sunset with a full moon rising, Bernard Spit, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) large adult walking along a barrier island, Bernard Spit, waiting for autumn freeze up so it can head out onto the sea ice to hunt, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) female walking along Bernard Spit, waiting for the autumn freeze up so she can head out onto the ice to hunt, Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) female walking along Bernard Spit, waiting for the autumn freeze up so she can head out onto the ice to hunt, Arctic National Wildlife Refuge, Alaska

Roger Powell / Moulting flock of Goosander {Mergus merganser} gathering on a sand spit, Varanger, Norway

Roger Powell / Moulting flock of Goosander {Mergus merganser} gathering on a sand spit, Varanger, Norway

Inaki Relanzon / Aerial view of coast at Nosy Be with small bay, North Madagascar.

Harley Betts / European Beachgrass (Ammophila arenaria) topped dune with rippled sand, Farewell Spit, Golden Bay, New Zealand

PREMAPHOTOS / Common froghopper adult {Philaenus spumarius} newly emerged from nymphal skin and about to leave froth, 'cuckoo spit', covering UK

Simon Colmer / Cuckoo spit, produced by Common froghopper nymph (Philaenus spumarius) for protection, UK.

Philippe Clement / Froghopper {Philaenus spumarius} next to white froth 'cuckoo spit' La Brenne, France.

Martin H Smith / Aerial view of Common seals {Phoca vitulina} on sand spit, Blakeney point, Norfolk, UK

Martin H Smith / Aerial view Common seals {Phoca vitulina} on sand spit, Blakeney point, Norfolk, UK

Pete Cairns / Dawn over Homer spit and Katchemak Bay, Alaska.

Pete Oxford / Cooking Cui / Guinea Pigs on rotating spit, Pelileo Town, Andes, Ecuador 2004

Pete Oxford / Cooking Cui / Guinea Pigs on rotating spit, Pelileo Town, Andes, Ecuador 2004

Martin H Smith / Aerial view of sand spit with Common seal colony {Phoca vitulina} Blakeney point, Norfolk

Kim Taylor / Froghopper (Philaenus spumarius) froth nest (cuckoo spit) made by nymph on grass, UK

Kim Taylor / Froghopper emerging from 'cuckoo spit' on buttercup stem. England. {Philaenus sp}

Duncan Mcewan / Plant hopper {Philaenus sp} in protective spittal - cuckoo spit

Ross Hoddinott / Ribwort plantain {Plantago sp} + Cuckoo spit (froth secreted by Planthopper larvae, UK

Rick Tomlinson / 1720 broaches in the fresh breeze off Calshot spit in the Solent, UK.