an informal birding record
tarsiger.co.uk
 
Caspian Gull
 

Larus cachinnans

Above: Juvenile-1st winter/1st calendar year (Essex, 10 September 2010)

Unfortunately, we never got to see the greater coverts on this well-marked bird as it remained partially obscured the whole time we were able to watch it. The lesser and median coverts appear to be rather strikingly patterned.

 

 

 

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