Spotted Owl

Identification

The spotted owl is a medium-sized owl with an average length of 43 cm (17 inches) and a wingspan of 114 cm (45 inches). Weighing around 600 grams (1.3 pounds), it is noticeably smaller and darker than the similar barred owl. The key distinguishing feature is the spotted owl's cross-shaped markings on its underparts, whereas the barred owl displays alternating bars on the breast and streaks on the belly. Barred owls are also grayer in appearance, making them relatively straightforward to differentiate once you know what to look for.

Range & Habitat

Three subspecies of spotted owl are recognized across western North America, each occupying distinct ranges. The northern spotted owl extends from southwestern British Columbia south through Washington and Oregon to Marin County, California. The California subspecies ranges through the Sierra Nevada and coastal mountains from the southern Cascades to northern Baja California. The Mexican spotted owl inhabits mountain ranges and canyons across the southwestern United States—including Utah, Colorado, Arizona, New Mexico, and western Texas—as well as western Mexico, with the Gila Wilderness supporting the largest population of this subspecies.

Spotted owls are strongly associated with old-growth and late-successional forests, preferring closed-canopy, uneven-aged woodlands in both hardwood and coniferous settings. The Mexican subspecies shows greater flexibility, also utilizing chaparral and pinyon woodlands in deep canyons. All three subspecies seek out areas with substantial canopy cover (often exceeding 70%) and large trees for nesting and roosting, along with nearby water sources. Elevation preferences vary by subspecies, ranging from 70 feet in the north to over 8,500 feet in the south and Mexican populations.

Behaviour & Diet

The spotted owl is entirely nocturnal, hunting under cover of darkness for small mammals and birds. This secretive owl does not build its own nest; instead, it occupies cavities in trees, deadwood, and snags, as well as abandoned nests of raptors or squirrels, typically positioning these nest sites between 12 and 60 metres (40 and 200 feet) above ground. Some favored nest sites are used repeatedly across years.

Spotted owls are monogamous and breed from early spring through late summer or fall. Pairs have an average breeding probability of 62%, meaning they do not breed every year. Clutch size is normally two eggs, though occasionally four may be laid. The female incubates the eggs for about a month and tends the young, while the male provides food. Fledglings remain dependent for three to four months after leaving the nest, dispersing in late summer and fall. These long-lived owls can reach 16 or 17 years of age, with annual survival rates typically exceeding 80%.

Best Time & Places to See It

Spotted owls are nocturnal and elusive, making them challenging subjects for observation. The northern subspecies is found from southwestern British Columbia through western Washington and Oregon; the California subspecies inhabits the Sierra Nevada and coastal mountains; and the Mexican subspecies frequents mountain ranges and canyons of the Southwest and Mexico. The Gila Wilderness in New Mexico is particularly notable as home to the largest population of Mexican spotted owls. Breeding season activity from early spring through summer may increase detectability, as pairs become more vocal during courtship and territorial displays.

Photography Tips

Photographing spotted owls demands patience, nighttime capability, and respect for the bird's threatened status. Night-vision or thermal imaging equipment is essential given their strictly nocturnal behavior. Focus on areas of old-growth forest with dense canopy cover and large trees, where these owls roost and nest. Early morning hours just before dawn may offer brief opportunities as owls return to roost. Always maintain distance and avoid disturbing nesting sites, particularly during breeding season from February through fall. Be aware that barred owls, which are larger and more aggressive, increasingly displace spotted owls in some regions, so confirm identification carefully before approaching.