Flammulated Owl

The Flammulated Owl is one of North America's smallest owls, barely larger than a sparrow, yet it produces a surprisingly deep, low-pitched call that seems to come from a much larger bird. It has small, indistinct ear tufts, dark brown or black eyes rather than the yellow eyes typical of most owls, and cryptic gray or reddish-brown plumage mottled to resemble tree bark.

Two color morphs occur - a grayer morph and a more rufous "flammulated" (flame-colored) morph, the latter giving the species its name. Its small size and rich camouflage make it extraordinarily difficult to spot even when calling from close range.

As one of the few truly migratory North American owls, wintering entirely in Mexico and Central America, it is almost exclusively insectivorous, a trait shared by few other owl species.

Key Field Marks

• Very small size with short, often barely visible ear tufts
• Dark brown/black eyes (not yellow)
• Cryptic gray or rufous mottled plumage resembling bark
• Deep, low hoot that sounds disproportionately large for the bird's size

Similar Species

• Western Screech-Owl is larger with yellow eyes and more prominent ear tufts.
• Northern Pygmy-Owl has yellow eyes, a longer tail, and lacks ear tufts, and is diurnal rather than strictly nocturnal.
• The combination of tiny size, dark eyes, and a deep, far-carrying hoot is diagnostic.

Flammulated Owls breed in open, mature montane forest dominated by ponderosa pine or other pines mixed with oak, typically at mid to high elevations in western North America, from British Columbia south through the Rocky Mountains and interior ranges to Mexico. They are almost entirely absent from lowland or dense closed-canopy forest.

This species is a long-distance migrant, wintering in pine-oak forests of Mexico and Central America, and arrives on breeding grounds relatively late in spring once insect prey becomes abundant.

Behavior

Strictly nocturnal and highly secretive, Flammulated Owls are far more often heard than seen, calling from dense cover high in pines. They are notoriously difficult to locate visually due to their small size and cryptic plumage.

Voice

The male's song is a soft, low, evenly spaced single or double hoot, "boop" or "boo-boot," repeated at intervals; the low pitch is deceptive given the bird's tiny size and can carry surprisingly far through open pine forest.

Feeding

Unlike most owls, this species feeds almost exclusively on insects, especially moths, beetles, and crickets, caught in flight or gleaned from foliage and bark at night.

Nesting & Breeding

Flammulated Owls nest in old woodpecker cavities, particularly those made by flickers, laying 2-4 eggs. Because they depend entirely on insect prey, they are among the last owls to arrive in spring and the first to depart in fall.