Leucocarbo colensoi (Buller, 1888)

Common Names and Taxonomic Baseline

The Auckland shag, also called the Auckland Islands shag, is a cormorant species with the scientific name Leucocarbo colensoi, native to New Zealand.

Endemic Distribution

This species is endemic to the Auckland Islands archipelago.

Movement and Diet

It is a sedentary bird, and its diet primarily consists of various crustaceans and fish.

Breeding Population Estimate

In recent years, approximately 1,000 breeding pairs of Auckland shag have been recorded.

Nesting Behavior

Auckland shags are colonial nesters, and they build large nests using materials including grass, twigs, and seaweed.

Reproductive Cycle

Females lay three pale blue-green eggs between November and February, and the incubation period lasts 26 to 32 days.

Conservation Status

Due to its small population size and limited global range, the IUCN lists the Auckland shag as a Vulnerable species.

Taxonomic Classification Dispute

Taxonomic classification of this species varies between authorities: the International Ornithologists' Union and others place it in the genus Leucocarbo, while other authorities place it in the genus Phalacrocorax.

Etymology of Specific Epithet

The species' specific epithet was chosen to honor the naturalist William Colenso.