Boreal Owl
A Reference for North and Central American Owls
The Boreal Owl is a much sought after nocturnal owl that lives in the northern boreal forests around the world.
Boreal Owls are the rarest owls in Alberta. They are also one of the most difficult to find even in areas where they are known to live all year round.
Boreal Owl
Aegolius funereus (Bonaparte)
Status Rare winter visitant. Although Blakiston and Bland (1856) rated it as "resident inland," this status is unsupported by other nineteenth-century authors.
Boreal owls begin breeding when they are a year old. The female usually lays four to six eggs in a cavity. She is mainly responsible for incubating them, while the male hunts and brings her food. The eggs hatch about 27 to 28 days after they are laid.
Boreal Owl
Description
Distinguishing Features - Length: approx. 25 cm. Colouration: the upper parts are grey-brown with white spots on the forehead, crown and the area around the facial disk.
Boreal Owl (Aegolius funereus)
Northern Saw-Whet Owl (Aegolius acadicus)
Flammulated Owl (Otus flammeolus) ...
The Boreal Owl is most likely to be confused with the Northern Saw-whet Owl but lacks brown in the face, has a pale bill, has a dark border to the face and darker brown upperparts. Screech-owls have ear tufts.
Bird fanatics are flocking to a tree near Tavern on the Green in Central Park, hoping to catch a peek of an ultra-rare boreal owl. (more) ...
It is known as the Boreal Owl in North America. This species is a part of the larger grouping of owls known as typical owls, Strigidae, which contains most species of owl. The other grouping is the barn owls, Tytonidae.
TENGMALM'S OWL.
[Boreal Owl.]
ULULA TENGMALMI, Gmel.
[Aegolius funereus.] ...
Other predators of bushy-tailed woodrats include the great-horned owl (Bubo virginianus) [16,29,78], boreal owl (Aegolius funereus) [68], American marten (Martes americana) [16,23,29], fisher (Martes pennanti) [130], and bobcat (Lynx rufus) [29].
There is a belief that they are not uncommon, but are just rarely seen by humans because of their shy nature. Larger predators are also a threat. Competitors such as Boreal owls, squirrels and starlings for nesting sites, ...
flight displays are made during the breeding season, migration and in winter. The sounds produced from airflow over the outstretched tail feathers are low, hollow and quavering hoots, "whu-whu-whu-whu-whu-whu-whu…," similar to that of the Boreal Owl.
 See also: Owl, Sparrow, Woodpecker, Hawk, Northern Saw-Whet Owl
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