Northern Pygmy-Owl
Northern Pygmy-Owl
Glaucidium gnoma
At a Glance
In western forests, this little owl is often active by day. It may fly fast and low from one tree to the next and then swoop up to take a high perch, rather like a shrike. An aggressive hunter despite its small size, it catches more birds than most small owls. Little gangs of chickadees and other songbirds often gather to 'mob' a pygmy-owl discovered in daylight, and they will react the same way to a birder who imitates the owl's whistled call.
All bird guide text and rangemaps adapted from by Kenn Kaufman漏 1996, used by permission of Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Category
Owls
IUCN Status
Least Concern
Habitat
Arroyos and Canyons, Forests and Woodlands, High Mountains
Region
Alaska and The North, California, Northwest, Rocky Mountains, Southwest, Western Canada
Behavior
Flap/Glide, Rapid Wingbeats, Undulating
Population
180.000
Range & Identification
Migration & Range Maps
No regular migration, but may wander away from breeding areas in fall and winter, including some downslope movement by mountain birds.
Description
7-7 1/2" (18-19 cm). Small, with pale bars on long tail. Sharp streaks on white belly. Two bold spots (like false eyes) on back of head. Overall color varies from grayish to warm brown.
Size
About the size of a Robin, About the size of a Sparrow
Color
Black, Brown, Gray, Red, White, Yellow
Wing Shape
Rounded, Short
Tail Shape
Long, Notched, Rounded, Square-tipped
Songs and Calls
A series of mellow whistles on 1 pitch. Also a thin rattle around the nest.
Call Pattern
Falling, Flat
Call Type
Chirp/Chip, Hoot, Whistle
Habitat
Open coniferous or mixed woods, wooded canyons. Found in a wide variety of forest types, including open oak groves, sycamores in canyons, pine-oak woodland, coniferous forest of far north and high mountains. Generally in partly open habitats rather than solid unbroken forest.
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Behavior
Eggs
3-4, sometimes 2-7. White. Incubation apparently is by female only, about 28 days.
Young
Both parents take part in providing food for young, with male bringing much of prey, female feeding it to young. Female may roost in nest hole with young at first. Age of young at first flight about 27-28 days.
Feeding Behavior
Hunts most actively near dawn and dusk, but also at other times. Watches for prey from a perch, then makes very rapid pursuit flight.
Diet
Includes rodents, birds, insects, lizards. Diet varies with location and season. Rodents such as voles and mice are often major prey, also catches mammals as large as gophers and squirrels. During warm weather, eats many large insects such as grasshoppers, crickets, cicadas, beetles. Small songbirds are sometimes up to one-third of diet. In southern parts of range, may catch many lizards.
Nesting
Some birds defend territories all year; in breeding season, pairs defend very large nesting territories. Courtship displays at dusk may involve rapid aerial chases through the trees near potential nest sites. In courtship on perch, male feeds female. Nest site is in cavity in tree, either in natural hollow or (perhaps more often) in abandoned woodpecker hole, and usually 8-25' above ground.
Climate Vulnerability
Conservation Status
Generally uncommon, but widespread; no evidence of general declines.
Climate Threats Facing the Northern Pygmy-Owl
Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.