I have seen the occasional Yellow-legged Gull (Larus michahellis) in Britain that appeared to have dark eyes, but the views were often distant, so I may have been mistaken. In Gulls of Europe, Asia and North America it states that in adults the eyes are rarely dark brown or darker. The gull below, that I saw in Portugal, is not quite fully adult, but it clearly has very dark eyes that are not likely to alter significantly as it reaches full adulthood.
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Dark Eyed Yellow-legged Gull
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It is useful to know that the eyes of 'large white-headed gulls' are variable. It is normal for adult and near-adult Herring and Yellow-legged Gulls to have pale yellowish eyes and Caspian Gulls to have dark brown eyes, but it it worth knowing that there is variation and eye colour is not a feature to rely on when identifying these gulls.
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| Dark Eyed Yellow-legged Gull |
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| Yellow-legged Gull of a Similar Age with Typical Pale Eyes |
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