lalows2's picture

Juvenile gull

Observed: 3rd September 2011 By: lalows2lalows2’s reputation in Birdslalows2’s reputation in Birds
juvgull2
Description:
Identifications
Species interactions

No interactions present.

Species with which Lesser Black-Backed Gull (Larus fuscus) interacts

Comments

David Jardine's picture

Separating first year gulls

The key characteristis for telling first year Lesser BB Gull from Herring Gull is the colour of the inner primaries - a feature which is not well shown by this photograph. A flight photograph of the same bird would be definitive. In Herring gull they are pale, and in LBB Gull they are dark.

lalows2's picture

This one was being

This one was being guarded/defended by its LBBG parents. So easy really.
From the pic the mantle and scapulars are dark chocolaty brown with a narrow pale margin combined with similarly marked and 'un-notched' tertials. Juvvy Herring Gulls are similarly marked but generally paler esp in die=rect comparison with noticably notched tertials

Cheers
D

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