Staffan Widstrand / Black tern (Chlidonias nigra) flying in to feed its chick on tfloating vegetation in the Nemunas Delta Nature Reserve, Lithuania.
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John Chan / Forster's tern (Sterna forsteri) plunge diving for fish in a saltmarsh estuary, Southern California, USA, May.
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David Woodfall / Location for filming 'The Vikings', TV series about the life of a Viking village. Built in a Kilcoole marsh wetland, a special site protected by Irish Govt, for its biological / conservation v...
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Marie Read / Black terns (Chlidonias niger), pair on a perch, vocalizing during courtship (termed 'Erect Posture' display), Montezuma National Wildlife Refuge, New York, USA, May.
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Loic Poidevin / Whiskered tern (Chlidonias hybrida) standing amongst White water lilies (Nymphaea alba). Danube Delta, Romania. May.
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Loic Poidevin / Black tern (Chlidonias niger) pair at nest on floating water lilies. Danube Delta, Romania, May.
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Loic Poidevin / Whiskered tern (Chlidonias hybrida) pair at nest in water lilies. Danube Delta, Romania. May.
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Robin Chittenden / Whiskered tern (Chlidonias hybrida) group in flight, Romania. May.
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Roger Powell / Two Whiskered terns (Chlidonias hybridus) fighting over perch, Le Cherine Nature Reserve, La Brenne, France. April.
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Roger Powell / Two Whiskered terns (Chlidonias hybridus) fighting over perch, Le Cherine Nature Reserve, La Brenne, France. April.
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Roger Powell / Two Whiskered terns (Chlidonias hybridus) fighting over perch, Le Cherine Nature Reserve, La Brenne, France. April.
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Roger Powell / Two Whiskered terns (Chlidonias hybridus) disputing a perch on top of a post in a lake. Le Cherine Nature Reserve, La Brenne, France.
