Goldcrest

This photo was taken at the RSPB site at Baron's Haugh, Motherwell during April 2010.
The technical information is as follows.
Camera - Canon EOS 50D
Shutter speed - 1/500
Aperture - f6.3
Lens - Canon EF 400mm f5.6 L USM
Focal Length 400mm
ISO 640
Monopod