Otus
flammeolus
(Flammulated Owl)
Physical
Description:
6-7" (15-18 cm). Has small,
indistinct ear tufts and dark eyes on a brownish-gray face framed by black.
Grayish above with largish white spots on shoulders; light below, with white
and rust-colored markings.
Similar Species- Screech-owls
Song:
A low, mellow hoot, single
or double, is repeated almost endlessly, and sounds mechanical.
Distribution:
Breeds locally from southern
and southeastern British Columbia, north-central Washington, eastern Oregon,
Idaho, western Montana, and northern Colorado, south to portions of southwestern
states and central Mexico. Winters from central Mexico, south in highlands to
Guatemala and El Salvador, and casually north to southern California.
Habitat:
Found in montane forests; associated mainly
with ponderosa or Jeffrey pine (often intermixed with aspen in northern range,
oaks in southern range, Douglas-fir in British Columbia). In areas with warm,
dry summers, also found locally in spruce/fir and lodgepole pine/red fir. During
migration
, found in wooded areas
in lowlands and mountains. Prefers old growth. In Idaho, occupies older ponderosa
pine, Douglas-fir, and mixed coniferous
forests.
Diet:
Feeds on various insects (e.g.,
moths, beetles, grasshoppers, crickets, and caterpillars). May eat small mammals
or birds.
Ecology:
Nocturnal
. Foraging tactics include
hawk-gleaning, hawking, hover-gleaning, and drop-pouncing. Nests in cavity (old
woodpecker hole) in standing snag. In Colorado study, nesting home ranges averaged
14 ha; foraging activity was concentrated in 1-4 areas within home range. During
nesting period in Colorado, foraging activity peaked 15-30 min after sunset
and 1-1.5 hr before sunrise; birds ceased activity during snow or rain. One
study found generally fewer than 4 singing males/40 ha in Oregon, British Columbia,
and Colorado. Surveys in Idaho report densities up to 1.24 males/40 ha.
Conservation:
| Element Code: | ABNSB01020 |
| Status: | Protected nongame species |
| Global Rank: | G4 |
| State Rank: | S3,NTMB |
| National Rank: | N4B |
Important
State References:
Moore, T.L. and G.D. Frederick.
1991. Distribution and habitat of flammulated owls (Otus flammeolus) in west-central
Idaho. Idaho Dept. Fish & Game, Boise. 28pp.