Northern saw-whet owl
The northern saw-whet owl is a small owl native to North America. Adults are 17–22 cm long with a 42–56. 3 cm wingspan. They can weigh from 54 to 151 g with an average of around 80 g. They are similar in size to the American robin.
About Northern saw-whet owl in brief
The northern saw-whet owl is a small owl native to North America. Adults are 17–22 cm long with a 42–56. 3 cm wingspan. They can weigh from 54 to 151 g with an average of around 80 g. They are similar in size to the American robin. There are two sub-species: Aegolius acadicus acadicus found all around North America and the non-migratory Aegolios acadicus brooksi endemic to the Haida Gwaii archipelago in British Columbia. A. a. brook SI is identified by a darker, buffier plumage and has been proposed as a separate species, the Haidai saw-Whet owl. The northern saw. whet owl makes a repeated tooting whistle sound. Some say they sound like a saw being sharpened on a whetstone. They usually make these sounds to find a mate, so they can be heard more often April through June when they are looking for mates. Despite being more common in spring, they do vocalize year round. The advertising too-too-too call has been heard up to 300m away through forest.
At least 11 different vocalizations have been reported. These include the Advertising call, the Rapid call, Whine, Ksew call, Tssst call, Squeaks,, Twittering call, Guttural chuck, and begging calls of nestlings. A study by Beatini et al showed that the northern. saw- Whet owl had a possible sensitivity of 0 to 8.kHz with the best sensitivity ranging from 6 to 7.kHz. This allows it to hunt in the dark by hearing in a complete darkness by hearing alone. Their habitat is sometimes mixed deciduous forests, sometimes mixed woods, sometimes decidous forests or mixed woodland. They have a round, light, white face with brown and cream streaks. The underparts are pale with dark shaded areas; the upper parts are brown or reddish with white spots. The juveniles can often be confused with the juvenile Boreal owls.
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This page is based on the article Northern saw-whet owl published in Wikipedia (as of Dec. 09, 2020) and was automatically summarized using artificial intelligence.
