breeds on the offshore island slopes

Size
Length: 25-30 cm, Weight: 150-200 g
Lifespan
15-20 years
Diet
Carnivorous. Feeds on small fish, crustaceans, and squid. Forages by surface-seizing and shallow diving. Often feeds in association with feeding tuna.
Habitat
Open ocean and pelagic waters. Breeds on remote islands in burrows dug into soft soil under forest canopy or in tussock grasslands on steep slopes.
Range
Breeds on islands in North Atlantic, South Atlantic, Indian, and Pacific Oceans. In New Zealand, breeds on islands off North Island coast and in subantarctic.
Endemism
Visitor
Main Threats
Introduced predators on breeding islands including rats and mice. Light pollution disorienting fledglings near coastal towns. Climate change affecting prey.
Population
Global population estimated at 500,000-1,000,000 birds. In New Zealand, breeds on islands off the North Island coast and in the subantarctic regions.
Conservation Status
data_deficient
Human Risk
harmless
Handling Note
seabird, do not approach or disturb on nesting grounds
Conservation Note
Vagrant seabird; not assessed for conservation status in New Zealand.
Te Ao Māori
The little shearwater has no recognised Māori name. It is a bird of remote islands rather than the mainland. Shearwaters, known generally as tītī, were traditionally harvested by Māori for food and oil. The little shearwater, though small, was taken occasionally. Its colonies on offshore islands were known to local iwi. They managed the harvest sustainably. This practice connected coastal communities to the seasonal rhythms of the sea. The bird remains a part of this maritime heritage, even if it lacks a specific name.
Light pollution disorients fledglings. The little shearwater is small enough to fit in your hand but built to cross oceans. It is the smallest of its kind. The plumage is dark grey above and white below, with a dark cap and a white face. It looks like a miniature muttonbird, a smaller version of the sooty shearwater. The resemblance is not coincidence. They are cousins. It feeds on small fish and crustaceans, diving from the surface or plunging shallowly. It flies low over the water, with rapid, whirring wingbeats. A little shearwater in flight is fast, agile, and almost impossible to follow. It twists. It turns. It disappears behind a wave. Flight is rapid and erratic, with short glides and sudden banks. It does not soar like the larger shearwaters. It works harder. It has to. It is smaller. Breeding takes place on remote islands. The burrow is dug into soft soil on a steep slope, often under forest canopy. A single white egg is laid. Both parents share incubation duties. The chick is fed on regurgitated fish oil. It fledges at about two months. Then it leaves. It spends years at sea before returning to breed. In New Zealand, these birds breed on islands off the North Island coast. The Poor Knights, the Aldermen, and the Mercury Islands host colonies. They also breed in the subantarctic. The Antipodes, the Aucklands, and Campbell Island provide southern strongholds. It is a bird of the warm north and the cold south. The little shearwater is often confused with the common diving petrel. They are similar in size and colour. The shearwater has a longer bill. The diving petrel has a shorter one. The birds know the difference. Identification requires attention to detail. The call is a low, moaning chatter, heard only at night. On the Poor Knights, with the wind in the forest and the shearwaters calling, the sound is constant. It fills the darkness. The little shearwater was once considered the same species as the subantarctic little shearwater. They are now separate. The differences are subtle. The birds do not care about the distinction. Taxonomy is a human concern. Survival is theirs. The population is stable. The islands where they breed are mostly predator-free. The birds are safe there. For now. Introduced predators such as rats and mice remain a threat on some islands. Light pollution disorients fledglings near coastal towns, leading them astray. Climate change affects prey distribution patterns, altering the availability of food sources. The global population is estimated at 500,000 to 1,000,000 birds. In New Zealand, it breeds on islands off the North Island coast and in the subantarctic. The numbers are healthy. The range is vast. It carries on. No one told it otherwise.