Boreal Owl
helmipöllö · Aegolius funereus
Photo: Stefan Berndtsson, CC BY 2.0
Family: Strigidae (Pöllöt) · Size: 21–25 cm
The boreal owl or Tengmalm's owl is a small owl in the "true owl" family Strigidae. It is known as the boreal owl or, more rarely, Richardson's owl after Sir John Richardson, in North America, and as Tengmalm's owl in Europe and Asia, after the Swedish naturalist Peter Gustaf Tengmalm.
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