Taxonomic note
Following Kennedy and Spencer (2014) the genus Phalacrocorax has been divided into six genera, with P. magellanicus, P. bougainvilliorum, P. atriceps, P. verrucosus, P. carunculatus, P. chalconotus, P. onslowi, P. campbelli, P. ranfurlyi and P. colensoi moved into Leucocarbo (HBW and BirdLife International 2018).
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Handbook of the Birds of the World and BirdLife International. 2018. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 3. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v3_Nov18.zip.
Kennedy, Martyn & Spencer, Hamish. 2014. Classification of the Cormorants of the World. Molecular phylogenetics and evolution. 79: 249-257.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | C2a(i) |
Year | Category | Criteria |
---|---|---|
2018 | Vulnerable | C2a(i) |
2016 | Vulnerable | C2a(i) |
2012 | Vulnerable | B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v);C2a(i) |
2010 | Vulnerable | B1a+b(ii,iii,iv); B2a+b(ii,iii,iv); C2a(i) |
2008 | Vulnerable | B1a+b(ii,iii,iv); B2a+b(ii,iii,iv) |
2006 | Vulnerable | |
2005 | Vulnerable | |
2004 | Vulnerable | |
2000 | Vulnerable | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Lower Risk/Least Concern |
Migratory status | not a migrant | Forest dependency | does not normally occur in forest |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 52,900 km2 | medium |
Extent of Occurrence (non-breeding) | 8,900 km2 | medium |
Area of Occupancy (breeding/resident) | 45 km2 | medium |
Number of locations | 13 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 3300-5300 mature individuals | medium | estimated | 1994 |
Population trend | decreasing | poor | observed | - |
Generation length | 8.7 years | - | - | - |
Number of subpopulations | 2-100 | - | - | - |
Population justification: Population estimates have varied, although the population may be as high as 5,000-8,000 individuals (C. Lalas in litt. 1994). This is roughly equivalent to 3,300-5,300 mature individuals.
Trend justification: The species is suspected to be declining overall. The only national census dates from 1981, when the population was estimated at 1,800-2,000 breeding pairs, 900-1,000 in both Otago and Southland. The Otago population doubled to 1,850 pairs in 1987-1988, and the breeding range also expanded, but numbers then decreased to 1,500 pairs in 1992-1993 (Taylor 2000). In 1914, the population on Kane-te-toe Island was estimated at 400-500 nests; however, by 1975 the colony had been deserted (Watt 1975). The population on Centre Island declined from 600 to 25 nests between 1955 and 1991 (Taylor 2000). Colonies on Jacky Lee and Codfish Islands have also been deserted (B. Weeber in litt. 2000).
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
New Zealand | extant | native | yes |
Country/Territory | IBA Name |
---|---|
New Zealand | Bluff Harbour Awarua Bay |
New Zealand | Catlins Coast |
New Zealand | Dunedin Coast (offshore) |
New Zealand | Moeraki Katiki Point |
New Zealand | North Otago |
New Zealand | North Otago (offshore) |
New Zealand | Northern Titi Muttonbird Islands |
New Zealand | Omaui Island Oreti Estuary |
New Zealand | Otago Peninsula |
New Zealand | Rakiura (offshore) |
New Zealand | Raratoka Centre Island |
New Zealand | Ruapuke |
New Zealand | South Otago (offshore) |
New Zealand | Taiaroa Head |
New Zealand | Whenua Hou Codfish Island |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | resident |
Marine Intertidal | Rocky Shoreline | major | resident |
Marine Intertidal | Tidepools | major | resident |
Marine Neritic | Pelagic | suitable | resident |
Altitude | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
|||||||||
Biological resource use | Hunting & trapping terrestrial animals - Persecution/control | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Human intrusions & disturbance | Recreational activities | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
Purpose | Scale |
---|---|
Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Stewart Island Shag Leucocarbo chalconotus. Downloaded from
https://datazone.birdlife.org/species/factsheet/stewart-island-shag-leucocarbo-chalconotus on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/12/2024.