GBB Gull Photo Index
Great Black-backed Gull Larus marinus
Third-winter, Warwickshire, January 2010
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Great Black-backed Gull Larus marinusThird-winter, Warwickshire, January 2010 |
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© A. R. Dean
By its third winter Great Black-back Gull begins to resemble adult plumage but can be aged by browner and variegated wing-coverts and the lack of fully developed bill colour.
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