John Cancalosi / Ring-billed gull (Larus delawarensis), adult in flight, New York, USA
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John Chan / Flock of Elegant terns (Thalasseus elegans) with one attempting to mate with a female and Western gulls (Larus occidentalis) and Ring-billed gulls (Larus delawarensis) in background, Bolsa Chica Ecolo...
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John Cancalosi / Ring-billed Gull (Larus delawarensis), adult in flight, New York, USA
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John Cancalosi / Ring-billed Gull (Larus delawarensis), standing beside lake, New York, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis), adult in flight, New York, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) portrait, New York, USA
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John Cancalosi / Ring-billed Gull (Larus delawarensis) perched on a 'No Fishing' sign, New York, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis), adult in flight, New York, USA
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Gerrit Vyn / Ring-billed gull (Larus dalewarensis) in breeding plumage in flight. Ontario County, New York, USA. February.
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John Cancalosi / Ring-billed Gull (Larus delawarensis) in snow, New York, USA, January.
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John Cancalosi / Ring-billed Gull (Larus delawarensis) in snow, New York, USA, January.
Shattil & Rozinski / Ring-billed gulls (Larus delawarensis) large flock in flight and on water, Cherry creek state park, Denver, Colorado, USA, January
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Adrian Davies / Ring-Billed Gull (Larus delawarensis) scavenging dead fish. Fort de Soto, Florida, USA, January.
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Adrian Davies / Ring-Billed Gull (Larus delawarensis) scavenging dead fish. Fort de Soto, Florida, USA, January.
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Adrian Davies / Ring-Billed Gull (Larus delawarensis) scavenging dead fish. Fort de Soto, Florida, USA, January.
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Eric Baccega / Ring-billed Gull (Larus delawarensis) in flight. Quebec, Canada, January.
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Eric Baccega / Ring-billed Gull (Larus delawarensis) perching on post. Quebec, Canada, January.
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John Cancalosi / Ring-billed gull (Larus delawarensis) standing beside a lake. New York, USA, Sept 2008
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Marie Read / Red-breasted Merganser (Mergus serrator) with large fish, trying to escape attempted robbery by Ring-billed Gull (Larus delawarensis), Bolsa Chica Ecological Reserve, California, USA, February.
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Marie Read / Red-breasted Merganser (Mergus serrator) with large fish, trying to escape attempted robbery by Ring-billed Gull (Larus delawarensis). Bolsa Chica Ecological Reserve, California, USA, February.
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Adrian Davies / Ring-Billed Gull (Larus delawarensis) standing in profile, Sanibel Island, Florida, USA
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Gerrit Vyn / Adult Ring-billed Gull (Larus delawarensis) in winter plumage. Tompkins County, New York, USA, December.
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Hanne & Jens Eriksen / Ring billed gull {Larus delawarensis} portrait, Texas, USA
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Michael Hutchinson / Ring-billed gull (Larus delawarensis) sub-adult beside city lake with Capitol Building in the background, Washington DC, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) in flight, New York, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) in flight, New York, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) in flight, New York, USA
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Shattil & Rozinski / Ring-billed gull (Larus delawarensis) flock landing on water, Cherry Creek State Park, Denver, Colorado, USA
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Thomas Lazar / Ring-billed Gull (Larus delawarensis) in flight, summer plumage, Lake Michigan, USA
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Thomas Lazar / Ring-billed Gull (Larus delawarensis) on water with fish in beak, summer breeding plumage, Lake Michigan, Wisconsin, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) adult in flight, NY, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) adult in flight, NY, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) adult in flight, NY, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) adults in flight, NY, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) adults fighting in air, NY, USA
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John Cancalosi / Ring-billed gull (Larus delawarensis) adult in flight, NY, USA
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John Cancalosi / Ring-billed Gull (Larus delawarensis) adult, New York, USA
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John Cancalosi / Ring-billed Gull (Larus delawarensis) adult flying over lake, New York, USA
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John Cancalosi / Ring-billed Gull (Larus delawarensis) adult flying, New York, USA
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John Cancalosi / Ring-billed Gull (Larus delawarensis) juvenile on water, New York, USA
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Rolf Nussbaumer / Ring-billed Gull (Larus delawarensis) bathing, Rockport, Texas, USA. December 2003
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Rolf Nussbaumer / Juvenile Ring-billed Gull (Larus delawarensis) eating fish, Sanibel Island, Florida, USA. December 1998
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Thomas Lazar / Ring-billed gull {Larus delawarensis} Lake Michigan, Wisconsin, USA
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Shattil & Rozinski / Ring billed gull flying {Larus delawarensis} Colorado, USA