The Collared Petrel (P. brevipes) is sometimes regarded as a third subspecies but is often split as a separate species.
petrel | Snow Petrel | Eurasian Collared Dove | Zino's Petrel | Wilson's Storm Petrel | Hacienda San Antonio de Petrel | Collared Kingfisher | Antarctic Petrel | Rufous-collared Kingfisher | Red-collared Widowbird | Northern Giant Petrel | Crinkle-collared Manucode | Collared Flycatcher | Pycroft's Petrel | Fea's Petrel | Deserta's Petrel | Collared Pratincole | Chestnut-collared Swift | Cape Petrel | Bulwer's Petrel | Yellow-collared Chlorophonia | Wilson's Storm-Petrel | Wilson's Petrel | White-faced Storm Petrel | White-collared Seedeater | White-collared Fruit Bat | White-collared fruit bat | White-chinned Petrel | White-bellied Storm Petrel | Tristram's Storm-petrel |