Carol Walker / Sable Island horse, two stallions standing on beach, on windy day. Sable Island, Nova Scotia, Canada. August.
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Pete Oxford / Sand Dollar (Echinarachnius parma) shell on beach, Little Saint Simon's Island, Georgia
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Angelo Gandolfi / View of the white cliffs of Bonifacio. The large boulder (right) fell from the main block 800 years ago. It's called "grain de sable" (grain of sand). Corsica island, France, February 2010
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Alex Mustard / Dusky shark (Carcharhinus obscurus) investigating a scuba diver. Cat Island, Bahamas. July
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Mark Taylor / Sand dollar {Echinarachnius parma} in the sand. Vancover Island. Canada.
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Carol Walker / Sable Island horse, wild stallion rolling on back on beach, wildflowers in background. Sable Island National Park, Nova Scotia, Canada. July.
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Carol Walker / RF - Mustang herd standing in grassland, foal lying on ground. Red Desert Complex, Wyoming, USA. September. (This image may be licensed either as rights managed or royalty free.)
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Carol Walker / Two wild Sable Island Stallions on the beach on Sable Island, Canada.
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Carol Walker / Sable Island horse, group of wild horses including foal at waterhole. Sable Island National Park, Nova Scotia, Canada. September.
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Carol Walker / Sable Island horses, two wild stallions greeting, head to head . Sable Island National Park, Nova Scotia, Canada.