Sulawesi Masked-Owl
Tyto rosenbergii
A very large barn-owl with a gray facial disk, gray crown, and rufous upperparts and wings with scattered dark markings. Prefers open country, like agricultural land, plantations, and forest edge, from lowlands to mountains. Limited to Sulawesi. Distinguished from smaller Minahassa Masked-Owl by gray face, gray forecrown, more extensive dark markings across wings and upperparts, and preference for open country. Distinguished from Australasian Grass-Owl by feathered legs that do not project beyond the tail in flight, and by less contrasting wing pattern. Call is a long screeching note.
Identification
The Sulawesi masked owl grows to a length of about 43 to 46 cm (17 to 18 in). The upperparts of the male are charcoal grey with scattered white spots and streaks. The underparts are buff with dark spots and streaks and the facial mask is white or whitish-brown. The call is an eerie, long drawn-out screech and is usually emitted in flight.
Taxonomy
The Sulawesi masked owl was first described by the German ornithologist Hermann Schlegel in 1866 as Strix rosenbergii, but was later included in the genus Tyto. The specific name "rosenbergii" refers to the German surveyor and naturalist Hermann von Rosenberg who collected bird specimens in the East Indies and sent them to the National Museum of Natural History in Leiden to be classified. There are two subspecies, T. r. rosenbergii (Schlegel, 1866), found in Sulawesi and Sangihe, and T. r. pelengensis Neumann, 1939, found in Peleng in the Banggai Island group. Other common names for this bird include Rosenberg's owl, Rosenberg's barn-owl, Sulawesi owl, Sulawesi barn-owl, Celebes barn-owl, Celebes masked-owl and Celebes owl.
- Scientific name
- Tyto rosenbergii
- Authority
- (Schlegel, 1866)
- Order
- Strigiformes
- Family
- Tytonidae
- Genus
- Tyto
Range and habitat
- Migration
- Resident species
Behavior
Little is known of the ecology of the Sulawesi masked owl. It hunts at night in secondary forest, agricultural land, grassland and open country. Examination of pellets regurgitated by this owl in a cave showed that the diet includes rats and shrews. This owl is commonly encountered in cultivated areas and scrubland on early morning visits to the Gunung Ambang Nature Reserve in the north of Sulawesi.
Conservation
- Population trend
- stable
Photos
Distribution
Other Birds

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Sula Cicadabird
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Red-billed Pigeon
Patagioenas flavirostris
Large dark pigeon. Body and wings mostly bluish-gray with maroon-colored neck and shoulders. Note red bill with pale yellowish tip. Immature paler grayish without maroon tones. Common from Mexico to Costa Rica, mainly in lowlands and foothills. Barely enters the U.S. in Rio Grande Valley of south Texas. Typically seen in pairs or small flocks, often perched conspicuously in a variety of habitats, including open forests, patchy farmland, and mangroves. Tends to be fairly shy. Separated from other pigeons in Middle America by large size, bill pattern, and dark tail and undertail coverts. Listen for low cooing song: “whoo, whoop-a-whoo.”
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