LC
Blue Noddy Anous ceruleus



Taxonomy

Taxonomic note
Cibois et al. (2016) found that Procelsterna sits within Anous, which is accepted and results in P. cerulea changing name to Anous ceruleus (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: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v3_Nov18.zip.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2018 Least Concern
2016 Least Concern
2014 Least Concern
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 61,000,000
Extent of Occurrence non-breeding (km2) 38,800,000
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 0
Population trend Stable suspected -
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 - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 9.1 - - -

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

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


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
American Samoa N Extant Yes
Australia N Extant Yes
Cook Islands N Extant Yes
Fiji N Extant Yes
French Polynesia N Extant Yes
Japan N Extant Yes
Kiribati N Extant Yes
Marshall Islands N Extant Yes
Micronesia, Federated States of N Extant
Nauru U Extant
New Caledonia (to France) N Extant Yes
Niue (to New Zealand) U Extant
Norfolk Island (to Australia) U Presence Uncertain
Pitcairn Islands (to UK) U Presence Uncertain
Samoa N Extant Yes
Solomon Islands U Extant
Tokelau (to New Zealand) U Extant
Tonga U Presence Uncertain
Tuvalu N Extant Yes
United States Minor Outlying Islands (to USA) U Extant
USA N Extant Yes
Vanuatu U Extant
Wallis and Futuna Islands (to France) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
United States Minor Outlying Islands (to USA) Johnston Atoll
United States Minor Outlying Islands (to USA) Jarvis Island
United States Minor Outlying Islands (to USA) Baker Island
United States Minor Outlying Islands (to USA) Howland Island
New Caledonia (to France) Île Matthew
Cook Islands Mangaia
French Polynesia Fatu Huku
French Polynesia Hatuta'a
French Polynesia Ilots rocheux de Rapa et Marotiri
French Polynesia Nord-ouest de Nuku Hiva
French Polynesia Motu de l'ouest et du sud de Rangiroa
French Polynesia Rapa
French Polynesia Tahuata
French Polynesia Ilots rocheux de Ua Pou
Marshall Islands Bokak Atoll
Norfolk Island (to Australia) Phillip Island (Norfolk Island)
Australia Lord Howe Island Permanent Park Preserve (Lord Howe Island IBA)
French Polynesia Ilots rocheux de Ua Huka
French Polynesia Manui, Kamaka, Makaroa
French Polynesia Mehetia
Tonga 'Ata Island
Marshall Islands Bikar Atoll
Marshall Islands Enewetok Atoll
Chile Isla Sala y Gómez
French Polynesia Fangataufa
French Polynesia Manuae, Motu One et Maupihaa
New Zealand Kermadec (offshore)
Kiribati Millenium (Caroline) Island
Kiribati McKean Island
Kiribati Abariranga (Canton) Island
Kiribati Enderbury Island
Kiribati Rawaki (Phoenix Island)
Kiribati Kiritimati (Christmas Island)
Kiribati Malden Island
Kiribati Starbuck Island
French Polynesia Hatu iti
USA Northwestern Hawaiian Islands
Chile Isla Sala y Gómez - Marine
Norfolk Island (to Australia) Norfolk Island / Phillip Island - Marine
Australia Lord Howe Island - Marine
New Caledonia (to France) Île Matthew Marin
United States Minor Outlying Islands (to USA) Jarvis Island Marine
Kiribati Phoenix Islands Marine
Kiribati Kiritimati (Christmas Island) Marine
French Polynesia Marotiri Marine
French Polynesia Rapa Marine
American Samoa National Park of American Samoa - Tutuila
American Samoa West Tutuila
French Polynesia Mangareva
French Polynesia Kauehi
French Polynesia Tikehau
French Polynesia Hatu Iti Marine

Habitats & altitude
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  

Recommended citation
BirdLife International (2022) Species factsheet: Anous ceruleus. Downloaded from http://www.birdlife.org on 07/10/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 07/10/2022.