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: http://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 |
---|---|---|
- | - | D1+2 |
Year | Category | Criteria |
---|---|---|
2018 | Vulnerable | D1+2 |
2016 | Vulnerable | D1+2 |
2012 | Vulnerable | D1+2 |
2010 | Vulnerable | D1; D2 |
2008 | Vulnerable | D1; D2 |
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 (km2) | 2,100 | medium |
Extent of Occurrence non-breeding (km2) | 2,100 | medium |
Extent of Occurrence breeding/resident (km2) | 1 | medium |
Number of locations | 1 | - |
Fragmentation | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 874-975 | medium | estimated | 2013 |
Population trend | Stable | poor | estimated | - |
Decline (3 years/1 generation past) | - | - | - | |
Decline (5 years/1 generation past) | - | - | - | |
Decline (10 years/1 generation past) | - | - | - | |
Decline (10 years/3 generation future) | - | - | - | |
Decline (10 years/3 generation past and future) | - | - | - | |
Number of subpopulations | 1 | - | - | - |
Largest subpopulations | 100 | - | - | - |
Generation length (yrs) | 8.7 | - | - | - |
Population justification: In February 2013, the first bird count including an entire circumnavigation of the Bounty Islands group was carried out. The mean count of Bounty Island shags on land was 1,386.5 ± 75.5 birds (SD, range 1311-1462; roughly equivalent to 874-975 mature individuals) and 150 birds were also seen swimming or flying in the area.
Trend justification: Boat-based surveys conducted in 2011 suggest that numbers were similar to those counted in 2005 (J. Hiscock in litt. 2012), probably indicating that the population is stable overall.
Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
---|---|---|---|---|---|---|
New Zealand | N | Extant | Yes |
Country/Territory | IBA Name |
---|---|
New Zealand | Bounty Islands |
New Zealand | Bounty-Antipodes Plateau Marine IBA |
New Zealand | Bounty Islands |
New Zealand | Bounty Islands (nearshore) |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | resident |
Marine Neritic | Pelagic | suitable | resident |
Altitude | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Unknown | Unknown | ||||||
|
|||||||||
Climate change & severe weather | Storms & flooding | Timing | Scope | Severity | Impact | ||||
Future | Minority (<50%) | Slow, Significant Declines | Low Impact: 3 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Problematic native species/diseases - Arctocephalus forsteri | Timing | Scope | Severity | Impact | ||||
Ongoing | Whole (>90%) | Negligible declines | Medium Impact: 6 | ||||||
|
Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
---|---|---|---|---|---|---|
Pets/display animals, horticulture | - | - | International | Non-trivial | Recent |
Recommended citation
BirdLife International (2021) Species factsheet: Leucocarbo ranfurlyi. Downloaded from
http://www.birdlife.org on 17/01/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 17/01/2021.