Herring Gull (argentatus & argenteus)(last update: February 11, 2013) |
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Herring Gull (argentatus) 3CY, December 14 2015, Katwijk, the Netherlands.No ring to get provenance on this bird's origin. In rest, such birds may be mis-identified as 2CY birds, lacking the P10 mirror and the white tips on blackish primaries. |