Parent: Sitta (Nuthatches)

└─ Sitta carolinensis (White-breasted nuthatch)

└─── Sitta carolinensis aculeata

└─── Sitta carolinensis alexandrae

└─── Sitta carolinensis carolinensis

└─── Sitta carolinensis lagunae

└─── Sitta carolinensis mexicana

└─── Sitta carolinensis nelsoni

└─── Sitta carolinensis tenuissima