Pterodroma inexpectata (J.R.Forster, 1844)

Nomenclature and Classification

The mottled petrel (Pterodroma inexpectata), also known by the Māori name kōrure, is a seabird species belonging to the gadfly petrel group.

Adult Size

Adults typically measure 33 to 35 cm (13–14 in) in length, with a wingspan ranging from 74 to 82 cm (29–32 in).

Pelagic Behavior

This species is highly pelagic, meaning it rarely approaches land except when it nests and raises its young.

Diet

The mottled petrel feeds mostly on fish and squid, and also catches some crustaceans.

Migration Pattern

It is a transequatorial migrant: it breeds on islands around New Zealand, then migrates to the Bering Sea, where it concentrates in the Gulf of Alaska and the Aleutian Islands.

Current Breeding Range

While it was previously found on New Zealand's North and South main islands, it now only occurs on smaller offshore islands near Fiordland, Stewart Island, and the Snares Islands.

Largest Population Locations

The largest populations live on Codfish Island, Big South Cape Island, and the Snares Islands.

Nesting Habitat

The mottled petrel nests in burrows and rock crevices.

Historical Abundance

It was more abundant in the past than it is today.

Population Threats

The species' population has been, and continues to be, impacted by predation from introduced mammals.

Conservation Translocation

Chicks of the species have been reintroduced to Maungaharuru, a range of hills 24 km from the sea, in Hawke's Bay.