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Are these all Heuglin's Gulls ?

cywong

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1# A A A Post at 7/03/2009 12:08  Show author

Are these all Heuglin's Gulls ?

Are these all Heuglin's Gulls ?

Mai Po,  28.02.09

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cgeoff

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2# A A A Post at 8/03/2009 07:33  Show author
Pics 1 & 2: 1st winter mongolicus (Yellow-legged Gull)
Pics 3 & 4: 1st winter and one adult heuglini (Heuglin's Gull)
Pic 5: 1st winter mongolicus
Pic 6: 1st winter heuglini

Geoff

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cywong

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3# A A A Post at 9/03/2009 19:22  Show author
Thanks again for Geoff's expert opinion.

The 1st winter birds of these 2 species look very similar, I can only see the difference in their wings.

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