Wild Wonders of Europe / Zacek / Female Great grey owl (Strix nebulosa) on hogweed in snow, Oulu, Finland, February 2009

Andy Rouse / Snowy owl (Bubo scandiaca) flying, wings forward, Canada. Wild

Sven Zacek / Ural owl (Strix uralensis) hunting, Tartumaa county, Southern Estonia.

Marie Read / Snowy Owl (Nyctea scandiaca) female perched, Amherst Island, Ontario, Canada, January.

Sven Zacek / Eurasian pygmy owl (Glaucidium passerinum) perched on snow covered branch in evening light. Vorumaa, Southern Estonia. November.

Sven Zacek / Ural owl (Strix uralensis) female on nest after snowfall. Tartumaa, Southern Estonia. March.

David Allemand / Snowy owl (Bubo scandiacus) female landing in the snow, Quebec, Canada, March.

David Allemand / Snowy owl (Bubo scandiacus) Female landing in the snow, Quebec, Canada

Guy Edwardes / Snowy owl (Bubo scandiacus) walking on ground in snow, one foot raised, Ontario, Canada, January.

Markus Varesvuo / Snowy owl (Bubo scandiaca) female face close up, Canada February

Markus Varesvuo / Snowy owl (Bubo scandiaca) female sitting among snow covered vegetation on ground, Canada February

Markus Varesvuo / Hawk owl (Surnia ulula) takingn off from powder snow, possibly with prey in talons, Kuusamo Finland February