Parent: Sitta (Nuthatches)

└─ Sitta oenochlamys (Sulphur-billed nuthatch)

└─── Sitta oenochlamys apo

└─── Sitta oenochlamys isarog

└─── Sitta oenochlamys lilacea

└─── Sitta oenochlamys mesoleuca

└─── Sitta oenochlamys oenochlamys

└─── Sitta oenochlamys zamboanga