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Manchurian Reed-warbler Acrocephalus tangorum

IUCN Red List Criteria

Critically Endangered  
Endangered  
Vulnerable C2a(ii) 

IUCN Red List history

Year Category
2012 Vulnerable
2008 Vulnerable
2007 Vulnerable
2004 Vulnerable
2000 Vulnerable
1994 Not Recognised
1988 Not Recognised

Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type continent
Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 490,000 medium
Extent of Occurrence non-breeding (km2) 491,000 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 2500-9999 poor Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 2500-9999 - - -
Generation length (yrs) 4.4 - - -
Population justification: The global population estimate of 2,500-9,999 mature individuals is based on a detailed analysis of records by BirdLife International (2001), where it was concluded that the species must have a fairly small world population (i.e. fewer than 10,000). This estimate equates to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals. The population in China has been estimated at 100-100,000 breeding pairs and 50-10,000 individuals on migration (Brazil 2009).
Trend justification: Although perhaps more common than it was thought to be in the 1990s, this species is suspected to be continuing to decline at a moderate rate, owing to the conversion of many natural systems. While it may be tolerant of some modified habitats, the species is unlikely to cope with heavily intensified agricultural and urban environments.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Cambodia Native Extant   Yes    
China (mainland) Native Extant Yes      
Hong Kong (China) Vagrant Extant        
Laos Native Extant   Yes    
Myanmar Unknown Extant        
Russia (Asian) Native Extant Yes      
South Korea Vagrant Extant        
Thailand Native Extant   Yes    
Vietnam Native Extant     Yes  

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Cambodia Chhep site factsheet
Cambodia Stung / Chi Kreng / Kampong Svay site factsheet
Cambodia Stung Sen / Santuk / Baray site factsheet
Cambodia Veal Srongae site factsheet
China (mainland) Mudanfeng Nature Reserve site factsheet
Laos Dong Khanthung site factsheet
Thailand Khao Sam Roi Yot site factsheet
Thailand Lower Central Basin site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable breeding
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) suitable breeding
Altitude 0 - 0 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Agro-industry farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Marine & freshwater aquaculture / Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Marine & freshwater aquaculture / Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations / Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations / Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Acrocephalus tangorum. Downloaded from http://www.birdlife.org on 25/11/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 25/11/2014.

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 Vulnerable
Family Sylviidae (Old World warblers)
Species name author La Touche, 1912
Population size 2500-9999 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 490,000 km2
Country endemic? No
Links to further information
- Summary information on this species