France - Larus fuscus or argentatus ? (1 Viewer)

[maxi6215]

Hello,

I observed this gull the 5th of August at Dunkerque in France. I hesitate between a Larus fuscus and Larus argentatus, can you help me please ?

Cordially Maxime

 

[Valéry Schollaert]

Larus argentatus (Goéland argenté)

 

[lou salomon]

agree on juv herring gull

 

[maxi6215]

Thank you for your help !

Could you tell me if it exists a character that will allow me to differentiate them in the future ?

 

[lou salomon]

structure: long and narrow wings in LBBG with a very long primary projection in the sitting bird - short and broad wings in herring gull; but this needs a bit of experience.
'window': inner primaries, as seen in your bird usually are completely pale in herring gull, dark or just a bit paler than outer primaries in LBBG.
bill on average weaker in LBBG but careful with sexual differences: males have stronger bills than females in all large gull taxa.
http://www.gull-research.org/hg/0start.html
http://www.gull-research.org/lbbg1cy/0start.html

cheers

 

[maxi6215]

Thank you very much for this information !