email a friend
printable version
LC
Black-naped Tern Sterna sumatrana

IUCN Red List history

Year Category
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 full migrant Forest dependency Does not normally occur in forest
Land mass type   Average mass 106 g

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4,250,000 medium
Extent of Occurrence non-breeding (km2) 38,000,000 medium
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals Unknown not applicable Not Applicable 0
Population trend Unknown -
Number of subpopulations - - -
Largest subpopulation - - -
Generation length (yrs) 11 - - -
Population justification: The global population size has not been quantified, though national population estimates include: c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in China; c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Taiwan and c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in Japan (Brazil 2009).
Trend justification: The population trend is difficult to determine because of uncertainty over the extent of threats to the species (del Hoyo et al. 1996).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage
American Samoa Native Extant      
Australia Native Extant Yes    
Bangladesh Vagrant Extant      
British Indian Ocean Territory Native Extant Yes    
Brunei Native Extant      
Cambodia Native Extant Yes    
China (mainland) Native Extant      
Christmas Island (to Australia) Unknown Extant      
Comoros Native Extant      
Cook Islands Native Extant      
Fiji Native Extant      
French Southern Territories Unknown Extant      
Guam (to USA) Native Extant      
India Native Extant      
Indonesia Native Extant      
Japan Native Extant      
Kenya Unknown Extant      
Kiribati Native Extant      
Madagascar Vagrant Extant      
Malaysia Native Extant      
Maldives Native Extant      
Marshall Islands Native Extant Yes    
Mayotte (to France) Native Extant      
Micronesia, Federated States of Native Extant      
Mozambique Unknown Extant      
Myanmar Native Extant      
Nauru Unknown Extant      
New Caledonia (to France) Native Extant      
Niue (to New Zealand) Unknown Extant      
Northern Mariana Islands (to USA) Native Extant   Yes  
Palau Native Extant      
Papua New Guinea Native Extant      
Philippines Native Extant      
Samoa Native Extant      
Seychelles Native Extant Yes    
Singapore Native Extant      
Solomon Islands Native Extant      
Somalia Unknown Extant      
Sri Lanka Vagrant Extant      
Taiwan (China) Native Extant Yes    
Tanzania Unknown Extant      
Thailand Native Extant      
Timor-Leste Native Extant      
Tokelau (to New Zealand) Unknown Extant      
Tonga Native Extant      
Tuvalu Native Extant      
United States Minor Outlying Islands (to USA) Unknown Extant      
Vanuatu Native Extant      
Vietnam Native Extant      
Wallis and Futuna Islands (to France) Native Extant Yes    

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
China (mainland) Beiji Islands site factsheet
China (mainland) Dongtou Islands site factsheet
China (mainland) Jiushan Islands Nature Reserve site factsheet
China (mainland) Nanji Islands Nature Reserve site factsheet
China (mainland) Taizhou Islands site factsheet
China (mainland) Wuchishan Dao Nature Reserve site factsheet
China (mainland) Yushan Islands site factsheet
China (mainland) Zhongjieshan Islands site factsheet
Japan Okinawa coastal islets site factsheet
Japan Yaeyama islands site factsheet
Malaysia Talang-Satang National Park site factsheet
Seychelles African Banks site factsheet
Seychelles Aldabra atoll site factsheet
Seychelles Cosmoledo atoll site factsheet
Seychelles Islets of Farquhar atoll site factsheet
Taiwan (China) Matsu (Mazu) Islands Tern Refuge site factsheet
Taiwan (China) Northeastern Sea Islets site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Coastal/Supratidal Coastal Brackish/Saline Lagoons/Marine Lakes suitable breeding
Marine Coastal/Supratidal Coastal Brackish/Saline Lagoons/Marine Lakes suitable non-breeding
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands major breeding
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands major non-breeding
Marine Intertidal Rocky Shoreline suitable breeding
Marine Intertidal Rocky Shoreline suitable non-breeding
Marine Intertidal Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc major breeding
Marine Intertidal Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc major non-breeding
Marine Intertidal Tidepools suitable breeding
Marine Intertidal Tidepools suitable non-breeding
Marine Neritic Macroalgal/Kelp major breeding
Marine Neritic Macroalgal/Kelp major non-breeding
Marine Neritic Pelagic marginal resident
Marine Neritic Seagrass (Submerged) major breeding
Marine Neritic Seagrass (Submerged) major non-breeding
Marine Neritic Subtidal Loose Rock/pebble/gravel major breeding
Marine Neritic Subtidal Loose Rock/pebble/gravel major non-breeding
Marine Neritic Subtidal Rock and Rocky Reefs major breeding
Marine Neritic Subtidal Rock and Rocky Reefs major non-breeding
Marine Neritic Subtidal Sandy major breeding
Marine Neritic Subtidal Sandy major non-breeding
Marine Neritic Subtidal Sandy-Mud major breeding
Marine Neritic Subtidal Sandy-Mud major non-breeding
Altitude 0 - 0 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2014) Species factsheet: Sterna sumatrana. Downloaded from http://www.birdlife.org on 21/04/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/04/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Least Concern
Family Laridae (Gulls and terns)
Species name author Raffles, 1822
Population size Unknown mature individuals
Population trend Unknown
Distribution size (breeding/resident) 4,250,000 km2
Country endemic? No
Links to further information
- Summary information on this species