Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched in lichen covered tree. Helsinki, Finland. February.

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

Michel Poinsignon / Eurasian pygmy Owl (Glaucidium passerinum) perched on conifer branch, Vosges Mountains, France, June.

Markus Varesvuo / Pygmy owl (Glaucidium passerinum) portrait, headshot. Helsinki, Finland. February.

Markus Varesvuo / Pygmy owl (Glaucidium passerinum) portrait, close-up. Helsinki, Finland. February.

Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched on branch. Helsinki, Finland. February.

Sven Zacek / Eurasian pygmy owl (Glaucidium passerinum) perched on lichen covered Oak (Quercus sp) branch. Alam-Pedja Nature Reserve, Tartumaa, Southern Estonia. November.

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

Sven Zacek / Eurasian pygmy owl (Glaucidium passerinum) perched on snow covered Birch (Betula sp) branch. Vorumaa, Southern Estonia. November.

Sven Zacek / Eurasian pygmy owl (Glaucidium passerinum) with rodent prey, perched on branch. Vorumaa, Southern Estonia. November.

Sven Zacek / Eurasian pygmy owl (Glaucidium passerinum) perched on branch with bloody beak after feeding on a mouse, in Spruce (Picea sp) tree. Tartumaa, Southern Estonia. January.

David Allemand / Eurasian pygmy owl (Glaucidium passerinum) adult feeding fledglings, Ecrins National Park, Alps, France, June.