Loic Poidevin / Northern ravens (Corvus corax) interacting in snow, Leon, Spain, February.

Ingo Arndt / Thick billed ravens interacting {Corvus crassirostris} Simien NP, Ethiopia, East Africa

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

Markus Varesvuo / Seven Ravens (Corvus corax) perched on dead tree in the snow, Utajrvi, Finland, February

Markus Varesvuo / Common raven (Corvus corax) in flight, Kuhmo, Finland, March

Markus Varesvuo / Ravens mobbing White-tailed Eagle (Haliaetus albicilla) Kuusamo, Finland. April

Markus Varesvuo,Markus Varesvuo / Pair of Common ravens (Corvus corax) displaying, Vardo, Norway, March.

Markus Varesvuo / Raven (Corvus corax) in flight, Norway, April

Juan Carlos Munoz / Bearded vulture (Gypaetus barbatus) chasing Thick-billed Raven (Corvus crassirostris) in flight. Simien National Park, Ethiopia, Africa.

Markus Varesvuo / Common Raven (Corvus corax) two in flight during snow storm, Kuusamo, Finland April

Markus Varesvuo / Common Raven (Corvus corax) huddled down amidst snow storm, Utajarvi Finland, February

Staffan Widstrand / Eurasian / Grey wolf (Canis lupus) watching flying flock of Common raven (Corvus corax) Kuhmo, Finland. September.