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Steve Arena: RPS Adult Thayer's Gull
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Thayer's Gull (Larus thayeri)
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Steve Arena: Iceland Gull (Larus thayeri/kumlieni)
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Steve Arena: Iceland Gull (Larus thayeri/kumlieni)
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Steve Arena: Putative Thayer's Gull (L. g. thayeri)
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Steve Arena: Putative Thayer's Gull (L. g. thayeri)
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Steve Arena: Putative Thayer's Gull (L. g. thayeri)
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Steve Arena: Putative Thayer's Gull (L. g. thayeri)
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Steve Arena: Thayer's Gull (Larus glaucoides thayeri)
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Steve Arena: Putative Thayer's gull (Larus glaucoides thayeri)