Aegolius is a small genus of owls. Three of the species are restricted to the New World, but Tengmalm's Owl (Boreal Owl) has a circumpolar range through North America, Eurasia, the Alps and the Rockies.
The species are:
These are essentially nocturnal woodland owls of temperate or colder climates; the two northern species breed in North America’s coniferous forests, and the Unspotted Saw-whet Owl and Buff-fronted Owl (Central and South America respectively) are species of mountain cloud or oak forests.
More on [ Aegolius ]

Boreal Owls / Tengmalm's Owls - Boreal or Tengmalm's Owls - descriptions, photos and sounds.
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The Boreal Owl: A Superb Hunter - An article by Tomas Johansson about the Boreal Owl.
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The Raptor Center: Boreal Owl - Facts about the identifying traits, range, habitat, nesting, and diet of Aegolius funereus.
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