[33] In contrast, the white-faced storm petrel from New Zealand, P. m. maoriana has forked tail, characterized by the dark patches on the sides of the breast.

It also has shorter culmen, tarsus and middle toe lengths with claw than other North Atlantic counterparts like P. m. dulciae and P. m. albiclunis.

The white-faced storm petrel breeds on remote islands in the south Atlantic, such as Tristan da Cunha and also Australia and New Zealand.

[9] Since the Mud Islands' population is a real trans-equatorial migrant, their longer travel distances to non-breeding habitats may contribute to enhanced breeding synchrony.

[42] Moreover, in these populations, breeding synchronization is frequently seen in order to capitalize on favorable climate conditions and greater food supply, which may be scarce.

Additionally, because of the decreased capacity to fly during the moulting season, the amount of time spent on the water before returning to the colony increased.

[65][66] This frequent contact with the water, combined with their foraging method, hovering with the feet briefly touching down before bounding forward, may contribute to the accumulation of gelatinous anklets on their tarsi, as observed in individuals that breed in Chatham Islands.

[68] Observations recorded from ships indicate that they generally forage over continental shelves while sometimes venturing near the African coast and Canary Islands, particularly during chick rearing due to high productivity.

[68] For species in north-east Atlantic, they seem to travel without strong directional preferences for any well-defined foraging hotspot during incubation explaining that they are widely distributed when finding preys.

[28] Studies at the Chatham Islands found the white-face storm petrels feed on a wide range of krill, amphipods, planktonic crustaceans, and small fish.

[68] For the petrel subspecies that breed on Chalky Island and forage in the Bass Strait, they are also known as generalist diet with a majority of individuals are feeding on coastal krill and post-larval fish.

[8] During chick rearing, since white-faced storm petrels adjust their foraging patterns to meet higher energy demands by feeding their chicks at day and night, they have been observed consuming both mesopelagic and epipelagic prey which is consistent with their dispersal throughout ocean, as mesopelagic fish are hard to access in the shallower areas.

[78][79] This diet can be proved by the mercury measurements in their feathers that showed the reliance on deeper water prey during this crucial point in life stage.

[78][79] White-faced storm petrels are affected by a trematode Syncoelium filiferum, which uses the krill species Nematoscelis megalops as an intermediate host.

The petrels appear to be an accidental or dead-end host for the larvae of the trematode, which need to attach themselves to the gill filaments of near-surface fish to continue their life cycle.

[42] Widespread throughout its large range, the white-faced storm petrel is evaluated as Least Concern on the IUCN Red List of Threatened Species.

The colony of white-faced storm petrels at Mud Islands located off the coast of Victoria, Australia has been a significant population decline over the last century.

Changes in habitat, vegetation, increased pressures from other species to conquer breeding areas, and human activity have all contributed to this decline.

Below is the chronology happened to the decrease of Australian white faced storm petrel;[8] Potential Threats Potential Threats Conservations For this subspecies, due to its restricted breeding range which primarily nests in the Salvages Archipelago in the north-east Atlantic, they are considered vulnerable and has been designated as "Species of European Conservation Concern".

[87] Potential Threats and Population Estimates Furthermore, the white-faced storm petrels that live in the pelagic ecosystems of the subtropical northeast Atlantic like this subspecies are increasingly affected by plastic contamination.

[94] Research conducted through analyzing the regurgitated pellets of yellow legged gulls showed the growing impact of pollution in their environment.