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

Terry Whittaker / Gyrfalcons (Falco rusticolus) in flight, Skoruvikurbjarg bird cliffs, northeast Iceland. May.

Terry Whittaker / Gyrfalcon (Falco rusticolus). Skoruvikurbjarg cliffs, Langanes Peninsula. Northeast Iceland. May.

Terry Whittaker / Gyrfalcon (Falco rusticolus) in flight against blue sky, Skoruvikurbjarg cliffs, Langanes Peninsula. Northeast Iceland. May.

Espen Bergersen / Gyrfalcon (Falco rusticolus) chased by Raven (Corvus corax). Hornoya birdcliff, Vardo, Norway. March

Espen Bergersen / Gyrfalcon (Falco rusticolus) chased by Raven (Corvus corax). Hornoya birdcliff, Vardo, Norway. March

Espen Bergersen / Gyrfalcon (Falco rusticolus) with Herring gull (Larus argentatus) chasing it off, Hornoya birdcliff, Vardo, Norway. March

Espen Bergersen / Gyrfalcon (Falco rusticolus) attacked by Herring gull (Larus argentatus). Hornoya birdcliff, Vardo, Norway. March

Espen Bergersen / Gyrfalcon (Falco rusticolus). Hornoya birdcliff, Vardo, Norway. March