Buff-fronted Owl

The Buff-fronted Owl inhabits humid montane forest along the Andes and separately in the Atlantic Forest of southeastern South America. It is a small, distinctively colored member of the genus Aegolius, related to the saw-whet and boreal owls of the Northern Hemisphere.

It is an inconspicuous forest dweller, rarely observed and more often known from its distinctive call given at night from within dense forest canopy.

Its strong contrast between dark brown upperparts and warm buffy-orange underparts and facial feathers makes it fairly distinctive among small forest owls within its South American range.

Shape and Size

Flight feathers are small, roughly 11-13 cm on primaries, with soft fringed edges typical of owls.

Color and Pattern

• Upperparts and flight feathers dark brown, sometimes appearing almost blackish-brown
• Facial and underpart feathers are warm buffy-orange, strongly contrasting with the dark back
• Facial disc feathers show a dark rim around the paler orange face

Shaft and Vane

Shafts dark brown on upperpart feathers, paler on facial and underpart feathers; vanes soft and finely textured.

Distinguishing from Similar Species

The strong contrast between very dark upperparts and warm buffy-orange underparts and face is more pronounced than in most other small South American forest owls, making this a useful distinguishing trait.

Adults show dark brown upperparts contrasting with warm buffy-orange underparts and face, a dark-rimmed facial disc, and yellow eyes.

Sexes look similar, with females slightly larger. Juveniles show a more uniformly dark, downy plumage before developing the adult contrast. Adults undergo a single annual molt.

This species occurs in two separate regions: humid montane forest along the tropical Andes, and separately in the Atlantic Forest of southeastern Brazil, Paraguay, and northern Argentina.

It is generally considered a resident species within these forest habitats, though some local altitudinal movement may occur.

The Buff-fronted Owl is nocturnal, roosting by day in dense forest foliage. It feeds on large insects and small vertebrates within the forest interior and edge.

It nests in tree cavities. Its call is a rapid series of short whistled notes. A small feather showing dark brown upperparts and warm buffy-orange coloring found in Andean or Atlantic Forest habitat is consistent with this species.