an informal birding record
tarsiger.co.uk
 
Herring Gull
 

Larus argentatus (argenteus?)

Above: 3rd winter/4th calendar year (Lower Sunbury, Middlesex, 13 March 2004)

Above: Lower Sunbury, Middlesex (10 March 2004)

Certainly the top image shows a rather Caspish-looking bird. However, this is probably just a third winter (fourth calendar year) Herring Gull.

 

 

 

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