Bald Eagle by Martin Wheeler

Camera: Canon EOS-1Ds Mark II at 400mm, 1/640 at f5.6; ISO 200.

Black Kite by Martin Wheeler

Camera: Canon EOS-1Ds Mark II at 250mm, 1/5000 sec. at f5; ISO 400.
Martin has an online gallery of his photographs here

Kestrel by John Harper

Camera: Canon EOS-1D Mark II N at 500mm, 1/2500 sec. at f4; ISO 400.

Black Kite turning by John Harper

Camera: Canon EOS-1D Mark II N camera at 400mm, 1/2500 at f5.6; ISO 400.

Saker Falcon by John Harper

Camera: Canon EOS-1D Mark III at 500mm, 1/1250 at f4; ISO 1000.