Staffan Widstrand / Raven (Corvus corax) mobbing Gyrfalcon (Falco rusticolus), Hornoya Island, Varanger Peninsula, Norway, March.

Espen Bergersen / Gyrfalcon (Falco rusticolus) and Raven (Corvus corax) in flight, Hornoya bird cliff, Finnmark, Norway. March

Espen Bergersen / Gyrfalcon (Falco rusticolus) in flight with guillemot prey. Hornoya birdcliff. Finnmark, Norway. March

Espen Bergersen / Gyrfalcon (Falco rusticolus) flying with guillemot prey. Hornoya bird cliff. Finnmark, Norway. March

Markus Varesvuo / Gyrfalcon (Falco rusticolus) in flight, from directly below, Norway, July. Magic Moments book plate.

Markus Varesvuo,Markus Varesvuo / Gyrfalcon (Falco rusticolus), Vardo, Norway, March.

Wild Wonders of Europe / Jensen / Gyrfalcon (Falco rusticolus) in flight, Disko Bay, Greenland, August 2009

Wild Wonders of Europe / Bergman / Female Gyrfalcon (Falco rusticolus) on rock, Myvatn, Thingeyjarsyslur, Iceland, April 2009

Wild Wonders of Europe / Bergmann / Gyrfalcon (Falco rusticolus) on rock silhouetted against full moon, Myvatn, Thingeyjarsyslur, Iceland, April 2009

Wild Wonders of Europe / Bergman / Gyrfalcon (Falco rusticolus) juvenile calling, Thingeyjarsyslur, Iceland, July 2009

Wild Wonders of Europe / Bergmann / Gyrfalcon (Falco rusticolus) feeding chick, Thingeyjarsyslur, Iceland, June 2009

Wild Wonders of Europe / Bergmann / Gyrfalcon (Falco rusticolus) preening, Myvatn, Thingeyjarsyslur, Iceland, June 2009