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Dark-rumped Swift Apus acuticauda
BirdLife is updating this factsheet for the 2016 Red List
Please email us with any relevant information

IUCN Red List Criteria

Critically Endangered  

IUCN Red List history

Year Category
2013 Vulnerable
2012 Vulnerable
2008 Vulnerable
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened

Species attributes

Migratory status full migrant Forest dependency Medium
Land mass type continent
Average mass -


  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 5,200 medium
Extent of Occurrence non-breeding (km2) 1,000 medium
Number of locations 2-5 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 150-700 poor Estimated 2000
Population trend Stable -
Number of subpopulations 2-100 - - -
Largest subpopulation - - -
Generation length (yrs) 12.5 - - -
Population justification: The population is thought to number 250-999 individuals, based on estimates of breeding colony sizes ranging from a few to 200 individuals. This estimate equates to 167-666 mature individuals, rounded here to 150-700 mature individuals.
Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats. This is supported by observations: records at its known sites have remained stable for many years, for example at Cherrapunji (J. Eaton in litt. 2013).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Bhutan Native Extant Yes      
India Native Extant Yes      
Nepal Vagrant Extant        
Sri Lanka Vagrant Extant   Yes    
Thailand Native Extant   Yes    

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Bhutan Deothang / Narphang / Samdrup Jongkhar site factsheet
Bhutan Tshangkha site factsheet
India Blue Mountain (Phawngpui) National Park site factsheet
India Cherapunjee: cliffs, gorges and sacred groves site factsheet
India Dzuku Valley site factsheet
India Khonoma Nature Conservation and Tragopan Sanctuary site factsheet
India Lengteng Wildlife Sanctuary site factsheet
India Murlen National Park site factsheet
India Puliebadze-Dzukou-Zapfu site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major breeding
Forest Subtropical/Tropical Moist Lowland major non-breeding
Rocky areas (eg. inland cliffs, mountain peaks) major breeding
Rocky areas (eg. inland cliffs, mountain peaks) major non-breeding
Altitude 500 - 2470 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Logging & wood harvesting / Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Ecosystem degradation

Recommended citation
BirdLife International (2016) Species factsheet: Apus acuticauda. Downloaded from on 25/10/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from on 25/10/2016.

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 Vulnerable
Family Apodidae (Swifts)
Species name author (Jerdon, 1864)
Population size 150-700 mature individuals
Population trend Stable
Distribution size (breeding/resident) 5,200 km2
Country endemic? No
Links to further information
- Summary information on this species