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Story last updated at 4:53 p.m. Thursday, March 11, 2004

Bay Science

News from the Kachemak Bay Research Reserve

Queen Charlotte owl, blind owl, little nightbird and the sawyer are just a few of the many names for the Northern Saw-whet Owl (AEGOLIUS ACADICUS). Its Latin name is derived from the Acadia territory -- now Nova Scotia -- where it was first discovered in 1788 by European explorer Johann Gmelin. Saw-whet owls breed throughout much of the Lower 48 and Canada, as far north as South Central Alaska and as far south as Mexico.

These tiny predators stand only eight inches high and weigh three-to-four ounces as adults; however, their 18-to-22-inch wingspan can make them appear larger during flight. A reddish-brown face bearing white forehead streaks, a dark bill and an underside with brown stripes distinguishes Saw-whets from their larger cousin, the Boreal Owl (AEGOLIUS FUNEREUS). Their warning call resembles the sound of a saw being whetted for sharpening -- hence their name. Listen in the next couple months for their more common call: a repetitive "toot-toot-toot."

Saw-whet owls inhabit both deciduous and damp coniferous forests around Homer, finding old woodpecker holes and old-growth tree cavities ideal for nesting. They are strictly nocturnal, resting in densely wooded areas during the day. Often tame around humans, they quietly stalk mice, voles, shrews, or bats from a covered porch or protected alcove. A Saw-whet's small size places it in direct competition with squirrels and Boreal Owls for habitat and makes it vulnerable to predation by larger owls such as the Great Gray Owl (STRIX NEBULOSA) and Northern Hawk Owl (SURNIA ULULA).

Sponsored by the Kachemak Bay Research Reserve.

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