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In the next a Caspian resting with a darker individual to the left, what?:
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Is the same individual as in a previous post:
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Here alone, very dark Caspian, Steppe or heuglini? or even taymyrensis? :
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At least adult Caspian looks easy!:
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A bird that I think is a Steppe one:
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But I cannot say what is that... another Steppe or a very dark Caspian ?
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Finally a bird that looks really huge beside the Baltic one:
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I suppose is an hybrid YLGxCG (mirror/primaries, body colour and eye like Caspian, legs and bill like YLG).