Family Typical Owls (Strigidae)
Critically Endangered
Siau Scops-owl (Otus siaoensis)
Taxonomy
French: Petit-duc de Siau German: Siau-Zwergohreule Spanish: Autillo de Siau
Taxonomy:
Scops siaoënsis
Schlegel
, 1873,Siau
.Distribution:
Siau I, N of Sulawesi.
Descriptive notes
Only known specimen measured 19 cm; wing length 125 mm; tail length 55 mm; no data on mass. Small scops-owl (distinctly smaller than nearest congeners, O. manadensis... read more
Voice
Recently described as a rolling, two-note “"Ook-grrrrah” that lasts c. 0·7 seconds and is... read more
Habitat
Like its close congeners, assumed to inhabit forest.
Food and feeding
No information.
Breeding
No information.
Movements
No information.
Status and conservation
CRITICALLY ENDANGERED. CITES II. Restricted-range species: endemic to Siau I, N of Sulawesi and present in Siau EBA. Known only from the holotype, collected in 1866. Given... read more
Probably part of a species-group centred on O. manadensis (which see). Known from a single specimen. Until recently, treated as conspecific with O. manadensis, but separated during analysis that established O. collari, to which it is closest in morphology but from which it differs in its much smaller size (127 vs mean 161; allow 3); longer ear-tufts (at least 1); “more heavily marked and less conspicuously pale” throat (1); lack of “prominent pale nuchal collar” (2); “much more vermiculated, more regularly barred, and drabber” underparts (2); “fewer bands” on remiges and rectrices (ns[1 or 2]); “much more broadly, irregularly, and less strongly banded” tail (ns[1 or 2])#R. Monotypic.