Adult captive northern saw-whet owl, Aegolius acadicus, Alaska Raptor Center in Sitka, Southeast Alaska, USA.

Tengmalm's Owl (Aegolius funereus) in a lodge dug in a beech tree by a black woodpecker, Massif des Bauges, France

A boreal owl, Aegolius funereus, perching on a tree branch. Bayerischer Wald National Park, Bavaria, Germany.

Northern Saw-whet owl (Aegolius acadicus) on a branch after a snowfall. Mauricie region. Quebec. Canada

Tengmalm's owl (Aegolius funereus) emerging from a cavity in a dead tree, Finland