S. Müller, 1841,
Ambon, South Moluccas.
Probably closely related to O. mantananensis, the two being closely allied to the O. manadensis species-group (see above). Sometimes considered conspecific with O. manadensis, or variously to include O. enganensis, O. insularis and O. beccarii as races, but all shown to be morphologically and/or vocally distinct; moreover, O. alfredi recently treated as a rufous morph of race albiventris of present species, but shown by morphological study to be distinct and separate species. See also O. jolandae (below). Until recently was considered conspecific with O. tempestatis, which differs#R from nearest-neighbour O. m. albiventris in its well-spaced groups of 4–6 short-spaced barking calls vs well-spaced barking calls (same in Flores and Moluccas), those of tempestatis being slightly higher-pitched (3); slightly longer tail (no overlap, but tempestatis n=3) (allow 1); weaker dark markings on upperparts (1); notably more clearly barred tail (1); shorter ear-tufts (1); high incidence of rufous morph (6 of 13 specimens#R) (ns); belly more patterned, rather than largely white (ns); whiter and seemingly more extensive barring on the primaries (ns) (these last two not scored as particular to albiventris). Classification and true affinities of Otus taxa in SE Asia, particularly island forms, highly complex and still debatable, and relationship between present species and O. manadensis confused: form kalidupae currently included in latter, but sometimes placed with present species; current arrangement highly tentative, and further research required. Also, described races leucospilus and obira have been thought possibly synonyms of nominate race of present species, although at least the former distinct enough; vocalizations of obira similar to those of nominate, leucospilus and albiventris, but somewhat more restricted in frequency range#R. Race bouruensis sometimes included in nominate. Six subspecies currently recognized.
Food and feeding
Status and conservation
Only subscribers are able to see the bibliography. Login or Subscribe to get access to a lot of extra features!