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Alternative names: Sula Barn Owl; Sula Island Masked-Owl
- Tyto nigrobrunnea
31-32 cm. Female - dark brown upperparts with lines of small white spots, dark and unbarred wings, secondaries with whitish tips, brown tail with three dark bars. Golden-brown underparts, spotted and vermiculated black. Black iris.
- Clements, JF. 2009. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2009. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.