• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	D1+2

Red List history

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)	2,100 km2	medium
Extent of Occurrence (non-breeding)	2,100 km2	medium
Area of Occupancy (breeding/resident)	1 km2	medium
Number of locations	1	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	874-975 mature individuals	medium	estimated	2013
Population trend	stable	poor	estimated	-
Generation length	8.7 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

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	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
New Zealand	extant	native		yes

Country/Territory	IBA Name
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
		Stresses Indirect ecosystem effects, Ecosystem degradation
Climate change & severe weather	Storms & flooding	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Ecosystem degradation
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
		Stresses Competition

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Bounty Islands Shag Leucocarbo ranfurlyi. Downloaded from https://datazone.birdlife.org/species/factsheet/bounty-islands-shag-leucocarbo-ranfurlyi on 26/12/2024.
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 26/12/2024.