May form a species-group with N. meeki, N. theomacha and N. variegata (as well as recently split N. hypogramma, N. hantu, N. forbesi and perhaps N. natalis); this group has also been proposed as possibly including N. boobook (which see), N. leucopsis and N. novaeseelandiae, and perhaps other boobooks in Australasian Region; more research needed. Formerly considered to include N. natalis as a race, but latter now afforded full species status on basis of plumage details and molecular evidence; until recently treated as conspecific with N. hypogramma, N. hantu and N. forbesi, but molecular evidence has been invoked to suggest that species status for each one is more appropriate#R. Distinct from hypogramma on account of underparts whitish with very narrow brown bars vs reddish-brown with dense equally spaced barring (3); upperparts rufous vs dark brown (2); tarsi sparsely feathered vs densely feathered to toes (3); possibly dark vs pale irides (needs confirmation) (ns); smaller size, best gauged by shorter tail (for which the effect size is −2.74, score 2); and different voice, a “rapid succession of ku-ku-ku-ku-ku notes”and “frog-like double-noted kwaor-kwaor kwaor-kwaor“ vs a “barking urgh urgh“#R (3). Distinct from hantu (with which it shares bare bristly tarsi and, reportedly, voice#R) by upperparts and wing feathers a shade darker and vaguely barred (2); underparts whitish with very narrow brown bars vs reddish-brown with vestigial (pale rufous and cinnamon) barring (3); possibly dark vs pale irides (needs confirmation) (ns); larger size, best gauged by somewhat longer wing (effect size 2.11, score 2). Distinct from forbesi by having underparts whitish with very narrow brown bars (denser on breast) vs plain reddish-brown breast with strong equal rufous and white barring on belly (2); tarsi sparsely feathered vs densely feathered to toes (3); possibly dark vs pale irides (needs confirmation) (ns); somewhat longer wing (effect size 2.05, score 2) and different voice, as described above vs “monotonic, double-noted ku-kuk...; also a single frog-like gurr”#R (3). Monotypic.
Seram, in S Moluccas.
Food and feeding
Status and conservation
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