Black Headed Gull

This photo was taken one lunchtime in July 2005 at Edinburgh Park.
The technical information is as follows.
Camera - Canon EOS 300D
Shutter speed - 1/640
Aperture - f5.6
Lens - Sigma 50-500mm f4-6.3 APO EX HSM
Focal Length 500mm
ISO 400
Filter - UV