Mistle Thrush

This photo was taken near my home in West Calder during December 2009.
The technical information is as follows.
Camera - Canon EOS 50D
Shutter speed - 1/1600
Aperture - f7.1
Lens - Canon EF 500mm f4.0 L IS USM plus Canon Extender EF 1.4x II
Focal Length 700mm
ISO 400
Tripod