Juvenile Lesser Black-Backed Gull

This photo of a juvenile Lesser Black-Backed Gull was taken near Edinburgh Park station during April 2005.
The technical information is as follows.
Camera - Canon EOS 300D
Shutter speed - 1/2000
Aperture - f7.1
Lens - Sigma 50-500mm f4-6.3 APO EX HSM
Focal Length 500mm
ISO 400
Filter - UV