Parent: Catharus

└─ Catharus ustulatus (Swainson's thrush)

└─── Catharus ustulatus appalachiensis

└─── Catharus ustulatus incanus

└─── Catharus ustulatus oedicus

└─── Catharus ustulatus phillipsi

└─── Catharus ustulatus swainsoni

└─── Catharus ustulatus ustulatus