Little Shearwater

The Little Shearwater, known scientifically as Puffinus assimilis, is a diminutive member of the petrel family Procellariidae. This bird exhibits the characteristic "shearing" flight pattern of its genus, gliding effortlessly over the ocean's surface with wings held rigid, dipping from side to side, and occasionally skimming the wingtips across the water. When conditions are calm, it may adopt a more fluttering style of flight compared to its larger kin.

Identification Tips

In appearance, the Little Shearwater is a small seabird, measuring between 25 to 30 centimeters in length with a wingspan stretching from 58 to 67 centimeters. It bears a resemblance to the slightly larger Manx Shearwater but can be distinguished by its relatively shorter and broader wings, which feature a pale area on the inner flight feathers. Its bill is slender, and the dark eyes are notably conspicuous against the white plumage surrounding them.

Habitat

The Little Shearwater is a bird of the open seas. It breeds on islands and coastal cliffs, preferring to nest in burrows that offer protection from predators.

Distribution

This species has a broad range, with subspecies found across various islands and coastal regions. P. a. assimilis is native to Lord Howe Island and Norfolk Island, P. a. haurakiensis resides in northeastern North Island of New Zealand, P. a. kermadecensis is found on the Kermadec Islands, and P. a. tunneyi inhabits islands off southwestern Australia.

Behaviour

The Little Shearwater is a sociable bird, often seen in large flocks, particularly during autumn migration. It feeds on fish and molluscs but does not typically follow boats. While silent at sea, its breeding colonies are a cacophony of raucous cackling calls at night.

Breeding

Breeding Little Shearwaters lay a single, clear white egg, which is incubated by both parents over a period of 52 to 58 days. The nests are usually situated in grassy fields or among rocks, and the birds visit them only under the cover of darkness to avoid predators.

Conservation Status

The Little Shearwater is currently classified as Least Concern by the IUCN, indicating that it does not face any immediate threat of extinction.