John Chan / Flock of Western sandpipers (Calidris mauri) taking flight from salt marsh, Southern California, USA.
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Gerrit Vyn / Western Sandpipers (Calidris mauri) and Dunlin (Calidris alpina) roosting during spring migration. Gray's Harbor County, Washington, USA, April.
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John Chan / Flock of Western sandpipers (Calidris mauri) taking flight from salt marsh, Southern California, USA.
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John Chan / Flock of Western sandpipers (Calidris mauri) foraging on a mudflat at low tide, Southern California, USA.
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John Chan / Flock of Western sandpipers (Calidris mauri) taking flight from salt marsh, Southern California, USA.
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John Chan / Flock of Western sandpipers (Calidris mauri) taking flight from salt marsh, Southern California, USA.
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John Chan / Elegant terns (Thalasseus elegans) preening in a tidal basin, with Western sandpipers (Calidris mauri) foraging nearby, Southern California, USA, April.
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John Chan / Red-breasted merganser (Mergus serrator) preening on a sandbar, with Western sandpipers (Calidris mauri) feeding in the foreground, Bolsa Chica Ecological Reserve, California, USA, April.
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Glenn Bartley/ BIA / Western Sandpiper (Calidris mauri), Alaska
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Gerrit Vyn / Western Sandpiper (Calidris mauri) Yukon Delta National Wildlife Refuge, Alaska, USA June.
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Gerrit Vyn / Western Sandpiper (Calidris mauri) singing profile, Yukon Delta National Wildlife Refuge, Alaska, USA June
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Gerrit Vyn / Western Sandpiper (Calidris mauri) nest and eggs, camouflaged against ground cover, Yukon Delta National Wildlife Refuge, Alaska, USA June.