Adult summer Glaucous Gull (on right), Egilsay, 16 May 2013 (with 3cy Herring Gull) |
Third calendar year Iceland Gull (on right), Westray, 22 May 2013 (with adult Great Black-backed Gull, Hooded Crow and adult Herring Gull) |
Adult type feathers in the back of this 3CY Iceland Gull more obvious in this shot |
Isabel dilution mutant Herring Gull (centre), Seafield, Edinburgh, 29 May 2013 (with Herring Gulls) |
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