Lesser Noddy Anous tenuirostris


Taxonomic source(s)
Christidis, L. and Boles, W.E. 2008. Systematics and Taxonomy of Australian Birds. CSIRO Publishing, Collingwood, Australia.
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.

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
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

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) 19,500,000 medium
Extent of Occurrence non-breeding (km2) 37,700,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
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) 11.5 - - -

Population justification: The species has a large global population with an estimated minimum of 1,200,000 individuals (Delany and Scott 2006). In the Houtman Albrolhos, populations were estimated at 7,665, 6,325 and 34,895 pairs on Morley, Wooded and Pelsart Island respectively in 1993 (Higgins and Davies 1996).

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

Country/territory distribution
Country/Territory Presence Origin Resident Breeding Non-breeding Passage
Australia extant native yes
British Indian Ocean Territory extant native yes
Comoros extant vagrant yes
French Southern Territories extant uncertain
Kenya extant vagrant yes
Madagascar extant uncertain
Maldives extant native yes
Mauritius extant native yes
Mayotte (to France) extant uncertain
Mozambique extant uncertain
Oman extant native yes
Réunion (to France) extant uncertain
Seychelles extant native yes
South Africa extant vagrant yes
Sri Lanka extant vagrant
Tanzania extant native yes
Tonga extant native yes
United Arab Emirates extant vagrant yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Australia Houtman Abrolhos
Australia Houtman Abrolhos - Marine
British Indian Ocean Territory Danger Island, Chagos Bank - Marine
British Indian Ocean Territory Eastern Peros Banhos island group
British Indian Ocean Territory Nelson Island
British Indian Ocean Territory Western Great Chagos Bank island group
Maldives Haa Alifu Atoll
Mauritius Cargados Carajos Shoals
Mauritius Cargados Carajos shoals (Saint Brandon) - Marine
Mauritius Round Island / Serpent Island - Marine
Mauritius Serpent Island
Seychelles African Banks / Boudeuse island / Etoile island / Marie Louise island - Marine
Seychelles Aride island - Marine
Seychelles Aride Island Special Reserve
Seychelles Cousin Island Special Reserve
Seychelles Cousine island
Seychelles Frégate island
Seychelles Marie-Louise Island

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands major resident
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 (2023) Species factsheet: Anous tenuirostris. Downloaded from on 06/06/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 06/06/2023.