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    Northern Saw-whet Owl

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    Appearance

    The Northern Saw-whet owl (Aegolius acadicus) is a very small, earless, yellow-eyed owl, brown above, streaked with white and rufous below. On average, Northern Saw-whet owls are about 8 inches in length and have a wingspan of about 20 inches. Thick feathers extend down on their feet, and due to their relatively short legs, they look a bit legless.

    Behaviour

    Usually silent, in later winter and spring the Saw-whet owl utters a monotonous series of whistles. Saw-whet owls are almost entirely nocturnal, spending the day roosting quietly in dense foliage. At such times they are extraordinarily tame and may be approached closely or even handled.

    Diet

    At night this tiny owl becomes a rapacious hunter, preying on mice and other small rodents. Thanks to its huge asymmetrical ear cavities, this species has remarkable hearing.

    Nesting Behaviour

    Saw-whet owls are quite tame and may nest on the edges of yards and towns. The female lays five or six eggs in an abandoned woodpecker hole, squirrel dens, hollow trees and stumps or artificial nest box. She sits on her eggs for about a month, then broods her nestlings for three weeks, while the male provides food consisting of deer mice, small birds and insects.

    The young leave the nest after four to five weeks. They close to the nest and are fed mainly by the male for another month or longer. The female may seek another male and raise another brood.

    Predators

    They are preyed on by barred owls and great horned owls.

    Video Credits: Dominique Lalonde Films Nature
    Image Credits: CTolman

    References:

    1. Dana Gardner, Nancy Overcott – Fifty Uncommon Birds Of The Upper Midwest
    2. Charles Fergus, Amelia Hansen – Wildlife Of Pennsylvania And The Northeast

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