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

Taxonomic note
Cibois et al. (2016) found that Procelsterna sits within Anous, which is accepted and results in P. albivitta changing name to Anous albivattus (HBW and BirdLife International 2018). Procelsterna cerulea and P. albivitta (del Hoyo and Collar 2014) were previously lumped as P. cerulea following Sibley and Monroe (1990, 1993).

Taxonomic source(s)
Cibois, A., Thibault, J.-C., Rocamora, G. & Pasquet, E. 2016. Molecular phylogeny and systematics of Blue and Grey Noddies (Procelsterna). Ibis 158: 433-438.
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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2018	Least Concern
2016	Least Concern
2014	Least Concern
2012	Not Recognised
2008	Not Recognised
2006	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	does not normally occur in forest
Land-mass type		Average mass	72 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	21,600,000 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Generation length	9.1 years	-	-	-

Population justification: The combined populations of Anous ceruleus and A. albivittus are estimated to number 27,000-120,000 individuals, but the total for A. albivittus is unknown.

Trend justification: The overall population trend is stable, although some populations have unknown trends (Delany and Scott 2006).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Australia	extant	native	yes
Chile	extant	native	yes
New Zealand	extant	native	yes
Norfolk Island (to Australia)	extant	native	yes
Pitcairn Islands (to UK)	extant	native	yes
Tonga	extant	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Marine Coastal/Supratidal	Sea Cliffs and Rocky Offshore Islands	major	breeding
Marine Neritic	Macroalgal/Kelp	major	resident
Marine Neritic	Pelagic	major	resident
Marine Neritic	Seagrass (Submerged)	major	resident
Marine Neritic	Subtidal Loose Rock/pebble/gravel	major	resident
Marine Neritic	Subtidal Rock and Rocky Reefs	major	resident
Marine Neritic	Subtidal Sandy	major	resident
Marine Neritic	Subtidal Sandy-Mud	major	resident
Marine Oceanic	Epipelagic (0-200m)	suitable	resident
Marine Oceanic	Mesopelagic (200-1000m)	suitable	resident
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species disturbance, Reduced reproductive success

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Recommended citation
BirdLife International (2024) Species factsheet: Grey Noddy Anous albivittus. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-noddy-anous-albivittus on 22/12/2024.
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 22/12/2024.