[Switzerland] Herring Gull (1 Viewer)

[rafnuss]

Hello,

I went today to the same place than where this 1w Herring Gull was found :
http://www.ornitho.ch/index.php?m_id=54&mid=412535

I photographed what I am lead to believe to be the same individu. Would you agree ?

I am still not sure exactly how the ID was made and I am seeking your help with that.
The head is indeed a bit darker than the usual Yellow-Legged Gull, but the dark eye mask is still present. I can see that the coverts are more "chequered", but what should I be looking at in the tertials and greater coverts to make the ID?

Thank you very much for your help,

 

[lou salomon]

it's the same individual, rafnuss. check bill shape, greater covert pattern, amount of replaced scaps (seems to be quite a nordic bird with mostly juvenile ones) and wide white tertial crescents.