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    • Aegolius
  • (139)
Northern Saw-whet Owl (Aegolius acadicus), Alaska
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Alan Murphy/ BIA / Northern Saw-whet Owl (Aegolius acadicus), Alaska
Tengmalm's owl (Aegolius funereus) Bavarian Forest National Park, Germany, June. Captive.
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Konrad Wothe / Tengmalm's owl (Aegolius funereus) Bavarian Forest National Park, Germany, June. Captive.
Tengmalm's owl {Aegolius funereus} Germany
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Ingo Arndt / Tengmalm's owl {Aegolius funereus} Germany
Naturalist ringing Tengmalm's / Boreal owl (Aegolius funereus) chick, Jura, Switzerland, April.
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Laurent Geslin / Naturalist ringing Tengmalm's / Boreal owl (Aegolius funereus) chick, Jura, Switzerland, April.
Scientists examining mice left for chicks in Tengmalm's / Boreal owl (Aegolius funereus) nest by parents, Jura, Switzerland. May 2015.
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Laurent Geslin / Scientists examining mice left for chicks in Tengmalm's / Boreal owl (Aegolius funereus) nest by parents, Jura, Switzerland. May 2015.
Naturalist ringing Tengmalm's / Boreal owl (Aegolius funereus) Jura, Switzerland. April 2015.
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Laurent Geslin / Naturalist ringing Tengmalm's / Boreal owl (Aegolius funereus) Jura, Switzerland. April 2015.
Tengmalm's / Boreal owl (Aegolius funereus) chick in nestbox with mice prey, during bird ringing Jura, Switzerland. April.
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Laurent Geslin / Tengmalm's / Boreal owl (Aegolius funereus) chick in nestbox with mice prey, during bird ringing Jura, Switzerland. April.
Naturalist ringing Tengmalm's / Boreal owl (Aegolius funereus) Jura, Switzerland.
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Laurent Geslin / Naturalist ringing Tengmalm's / Boreal owl (Aegolius funereus) Jura, Switzerland.
Naturalist removing Tengmalm's / Boreal owl (Aegolius funereus) from nest box to be ringed. Jura, Switzerland. April 2015.
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Laurent Geslin / Naturalist removing Tengmalm's / Boreal owl (Aegolius funereus) from nest box to be ringed. Jura, Switzerland. April 2015.
Tengmalm's / Boreal owl (Aegolius funereus) looking out of nest in tree hollow, Switzerland. May.
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Laurent Geslin / Tengmalm's / Boreal owl (Aegolius funereus) looking out of nest in tree hollow, Switzerland. May.
Boreal Owl (Aegolius funereus) in winter, Zdarske Vrchy, Bohemian-Moravian Highlands, Czech Republic
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Juergen & Christine Sohns / Boreal Owl (Aegolius funereus) in winter, Zdarske Vrchy, Bohemian-Moravian Highlands, Czech Republic
Tengmalm's owl (Aegolius funereus) adult looking out of nest hole in tree. Finland. June.
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Jussi Murtosaari / Tengmalm's owl (Aegolius funereus) adult looking out of nest hole in tree. Finland. June.