The Siau scops owl (Otus manadensis siaoensis), is a critically endangered subspecies of scops owl and may be extinct. They live on Siau Island, north of Sulawesi, Indonesia and are (were) forest dwellers. The species is only known from a single holotype from 1866 although there have been some local reports in recent years. Even so, their habitat is being lost to excessive logging of the forest on the island and there would be very few if any individuals left. The taxonomic arrangement for this owl has not been fully worked out. Some consider it a distinct species, others a subspecies of the Sulawesi scops owl and others a subspecies of the Moluccan scops owl.