Bence Mate / Hooded crow (Corvus cornix) mobbing Buzzard (Buteo buteo) Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / White tailed sea eagle (Haliaeetus albicilla) and Hooded crow (Corvus cornix) in snow, Lake Csaj, Kiskunsagi National Park, Hungary. January.

Bence Mate / Juvenile White tailed eagle (Haliaeetus albicilla)in flight, with Hooded crow (Corvus cornix) mobbing it, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Donald M. Jones / Common Raven (Corvus corax) walking in snow, western Alberta, Canada

Donald M. Jones / Common Raven (Corvus corax) walking in snow, western Alberta, Canada

Donald M. Jones / Common Raven (Corvus corax) in snow, western Alberta, Canada

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

Bence Mate / Group of Great egrets (Ardea alba) reflected in still water, with Hooded crows (Corvus cornix), Lake Csaj, Pusztaszer, Hungary. Winner of the Portfolio category of the Terre Sauvage Nature Images Awar...

Sven Zacek / Ravens (Corvus corax) fighting in bog during snowfall, Tartumaa, Estonia. December.

Espen Bergersen / Common raven (Corvus corax) pair in courtship display, flying upsidedown and calling, Hornoya bird cliff, Norway. March.

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

Markus Varesvuo / White-tailed eagle (Haliaeetus albicilla) and hooded crow (Corvus cornix), Norway, October.