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28 bird species, all forest dwellers, are endemic to ecoregion. Seven species are endemic to Príncipe. The endemic subspecies of olive ibis on Príncipe, "B. o. rothschildi", is probably the rarest bird in the archipelago. Sixteen species are endemic to São Tomé, with two endemic genera. These include the São Tomé ibis ("Bostrychia bocagei"), São Tomé olive pigeon ("Columba thomensis"), São Tomé scops-owl ("Otus hartlaubi"), São Tomé fiscal ("Lanius newtoni"), São Tomé shorttail ("Amaurocichla bocagii"), giant sunbird ("Nectarinia thomensis"), São Tomé grosbeak ("Neospiza concolor") and São Tomé oriole ("Oriolus crassirostris"). Annobón is home to the endemic Annobón white-eye ("Zosterops griseovirescens") and Annobón paradise-flycatcher, ("Terpsiphone smithii"). An additional four endemic species inhabit two or more of the islands, including the Príncipe speirops ("Speirops leucophoeus") and velvet-mantled drongo ("Dicrurus modestus"), which inhabit both São Tomé and Príncipe, and the São Tomé bronze-naped pigeon ("Columba malherbii") which inhabits both São Tomé and Annobón.