Parent: Phaethon (Tropicbirds)

└─ Phaethon rubricauda (Red-tailed tropicbird)

└─── Phaethon rubricauda melanorhynchos

└─── Phaethon rubricauda roseotinctus

└─── Phaethon rubricauda rubricauda

└─── Phaethon rubricauda westralis