 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").