IUCN threat status:

Endangered (EN)

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Biology

Like other shearwaters, this species flies fast and often low over the ocean (2). Here it forages, often in association with wedge-tailed shearwaters, sooty terns and boobies, for small fish and squid (2). It dives into the water to pursue and capture its prey, often exploiting the actions of tuna and cetaceans, as they drive shoals of small fish to the surface (2). In the last week of April, adult Newell's shearwaters arrive at their island nesting grounds. During the first two weeks of June, they lay a precious, single egg into a burrow which has been dug under matted ferns or tussock grass (2), often at the base of a tree (4). The egg is thought to be incubated for around 51 days by both parents (2), who continue their parental care when the egg hatches, spending the daylight hours foraging in the ocean surrounding the island, travelling up to 1,200 kilometres from the colony, and returning at night to feed the chick (2) (4). By November, the young will have fledged and the parents provide no further care, leaving the young to start life on the open oceans (4). During the first year of life, Newell's shearwaters do not visit breeding islands, but as they age, they will visit colonies for progressively longer periods, until they first breed at the age of six (2).

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Source: ARKive

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