Black Guillemots Mating

This photo was taken at Oban during May 2009.
The technical information is as follows.
Camera - Canon EOS 50D
Shutter speed - 1/1600
EV -1/3
Aperture - f4.0
Lens - Canon EF 300mm f4.0 L IS USM
Focal Length 300mm
ISO 1000
Tripod