Mergus australis


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Mergus australis
Species Authority: Hombron & Jacquinot, 1841
Common Name(s):
English Auckland Merganser, Auckland Island Merganser

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Symes, A. & Butchart, S.
Facilitator/Compiler(s): Brooks, T., Khwaja, N., Mahood, S.
This species was formerly found on the Auckland Islands, New Zealand, but it is now Extinct, primarily due to hunting. It was last recorded in 1902, and had been lost by the time a reserve was set up on the islands in 1910.

Geographic Range [top]

Range Description: Mergus australis was restricted to the Auckland Islands, New Zealand, by the time of its discovery in 1840 (Stattersfield et al. 1998), but subfossil remains of a Mergus species have also been found on South and Stewart Islands. At least 26 specimens were collected in total, the last in 1902 (Kear and Scarlett 1970); there have been no records since, despite intensive searches (Williams and Weller 1974).

Regionally extinct:
New Zealand
Range Map: Click here to open the map viewer and explore range.

Habitat and Ecology [top]

Habitat and Ecology: It was largely a freshwater species, foraging in inland streams, estuaries and, occasionally, sheltered bays (Kear and Scarlett 1970).

Systems: Freshwater; Marine

Threats [top]

Major Threat(s): Its decline was presumably caused by a combination of hunting and predation by introduced pigs, rats, cats and dogs(Kear and Scarlett 1970) - the species's incipient flightlessness made it especially vulnerable (Livezey 1989b).

Citation: BirdLife International 2012. Mergus australis. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 28 August 2015.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided