The Kermadec Petrel is a tropical species in the genus Pterodroma, the Gadfly Petrels. It occurs largely in the Pacific Ocean, but also nests on one island in the Indian Ocean and there is some controversy over whether it is also found in the Atlantic! This petrel is a relatively large and sturdy species with variable plumage, ranging from pale headed and pale bellied morphs, to all dark morphs. The field mark that applies to all plumages is that this species has a white flash on the underwing, as in jaegers (Stercorarius), and diagnostic is that it has white shafts on the upper side of the primaries. Curiously, the behavior of this petrel also is jaeger-like as it is known to kleptoparasitize other seabirds. It has been suggested that the jaeger-like appearance may facilitate kleptoparasitism, so it may be one an avian example of Mullerian Mimicry.