Pal Hermansen / Pygmy owl (Glaucidium passerinum) looking directly at camera as it peers out of nest hole in dead tree trunk, Viken, Norway.
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Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched in lichen covered tree. Helsinki, Finland. February.
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Sven Zacek / Eurasian pygmy owl (Glaucidium passerinum) perched on snow covered branch in evening light. Vorumaa, Southern Estonia. November.
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Michel Poinsignon / Eurasian pygmy Owl (Glaucidium passerinum) perched on conifer branch, Vosges Mountains, France, June.
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Wim van den Heever / Pearl-Spotted Owl (Glaucidium perlatum) perched on a branch. Okavango Delta Botswana
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Richard Du Toit / Pearlspotted Owl (Glaucidium perlatum) on branch, Kgalagadi, South Africa
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Markus Varesvuo / Eurasian pygmy owl (glaucidium passerinum) perched on branch, Helsinki, Finland, January
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Gerrit Vyn / Northern Pygmy owl (Glaucidium gnoma) adult in tree in winter, Okanogan County, Washington, USA, November
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Markus Varesvuo / Pygmy Owl (Glaucidium passerinum) perched in pine tree. Hyvink? Finland. January
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Bengt Lundberg / Pygmy owl peers out of nest hole in tree {Glaucidium passerinum} Sweden
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Donald M. Jones / Mountain Pygmy-Owl (Glaucidium gnoma), western Montana
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Donald M. Jones / Mountain Pygmy-Owl (Glaucidium gnoma) with mouse prey, western Montana. Sequence 1 of 2
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Donald M. Jones / Mountain Pygmy-Owl (Glaucidium gnoma), northwestern Montana
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Donald M. Jones / Mountain Pygmy-Owl (Glaucidium gnoma), northwestern Montana. Sequence 1 of 2
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Claus Meyer / Ferruginous Pygmy Owl (Glaucidium brasilianum) swallowing a captured lizard, Caatinga, Brazil
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Tom Vezo / Ferruginous Pygmy Owl (Glaucidium brasilianum) adult peering out from nest hole in Saguaro (Cereus gigantea) cactus, Altar Valley, Arizona
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Bernard Castelein / Pearl-spotted owlet (Glaucidium perlatum) perched in tree, Allahein river, The Gambia.
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Bernard Castelein / Pearl-spotted owlet (Glaucidium perlatum) perched in tree, Allahein river, The Gambia.
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Joel Sartore / Photo Ark / Collared owlet (Glaucidium brodiei) looking around, Night Safari, part of Wildlife Reserves Singapore, Singapore. Captive.
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Joel Sartore / Photo Ark / Cactus ferruginous pygmy owl (Glaucidium brasilianum cactorum) looking around as well as towards camera, Wild at Heart Raptor Rehabilitation Center, Arizona. Captive.
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Joel Sartore / Photo Ark / Collared owlet (Glaucidium brodiei) looking around before flying away, Night Safari, Wildlife Reserves, Singapore. Captive.
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Joel Sartore / Photo Ark / Pearl-spotted owl (Glaucidium perlatum) looking around, Monticello Center, Italy. Captive.
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Joel Sartore / Photo Ark / Pearl-spotted owl (Glaucidium perlatum) looking around, Monticello Center, Italy. Captive.
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Maxime Aliaga / Austral Pygmy-owl (Glaucidium nanum), Los Glaciares National Park, Argentina
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Maxime Aliaga / Austral Pygmy-owl (Glaucidium nanum), Los Glaciares National Park, Argentina
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Mateusz Piesiak / Eurasian pygmy owl (Glaucidium passerinum), perched on branch in autumn, Bieszczady Mountains, Poland. September.
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Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched on branch. Helsinki, Finland. January.
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Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched in lichen covered tree. Kuusamo, Finland. April.
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Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched on branch in snow. Kuusamo, Finland. February.
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Markus Varesvuo / Pygmy owl (Glaucidium passerinum) perched on branch. Helsinki, Finland. January.
