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Northern saw-whet owl : ウィキペディア英語版 | Northern saw-whet owl
The northern saw-whet owl (''Aegolius acadicus'') is a small owl native to North America. ==Description== The scientific description of one of the sub-species of this owl is attributed to the Rev. John Henry Keen who was a missionary in Canada in 1896. Adults are long with a wingspan.〔() (2011).〕〔() (2011).〕 They can weigh from with an average of around ,〔''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5.〕 making them one of the smallest owls in North America. They are close to the size of an American robin. The northern saw-whet owl has a round, light, white face with brown and cream streaks; they also have a dark beak and yellow eyes. They resemble the short-eared owl, because they also lack ear tufts, but are much smaller. The underparts are pale with dark shaded areas; the upper parts are brown or reddish with white spots. They are quite common, but hard to spot.
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