Least Boobook

Ninox sumbaensis

A rufous-brown owl with yellow eyes, prominent white eyebrows, and mottled underparts. Juvenile reportedly redder-colored and plainer. Inhabits forested lower foothills, regularly in pairs. A recently described, little-known owl confined to Sumba. Smaller than Sumba Boobook, and separated by yellow eyes, lack of bands on the underparts, and markedly different voice.  Song is a single “woop” note, often given as a duet. One sex calls with a higher pitch than the other.

Identification

The least boobook is about 23 cm (9.1 in) long and weighs 90 g (3.2 oz). The head is grey with fine dark barring and distinctive white eyebrows but an indistinct facial disc. The beak is large and yellow, the eyes are yellow and there are no eartufts. The upper parts are light brown with widely separated, dark wavy markings and the underparts are whitish with fine dark chevrons. The tail is pale reddish-brown with dark barring. The legs and talons are yellow. This bird is smaller and has relatively longer wings than the Sumba boobook (Ninox rudolfi) which also occurs on the island.

Taxonomy

Scientific name
Ninox sumbaensis
Authority
Olsen, Wink, Sauer-Gürth & Trost, 2002
Order
Strigiformes
Family
Strigidae
Genus
Ninox

Range and habitat

Migration
Resident species

Behavior

Little is known about this bird. Several pairs have been observed in primary and secondary forest but not in the surrounding open terrain where the Sumba boobook hunts. The conservation status of this owl is assessed as being "Endangered" by the International Union for Conservation of Nature as it has a small range, a moderately small total population and is likely to be decreasing in abundance because of forest clearance.

Conservation

Population trend
declining

Photos

Distribution

Bird Calls

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