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Aquatic Warbler Acrocephalus paludicola
BirdLife is updating this factsheet for the 2016 Red List
Please email us with any relevant information

IUCN Red List Criteria

Critically Endangered  
Vulnerable A2c 

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 Does not normally occur in forest
Land mass type continent
Average mass -


  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 183,000 medium
Area of Occupancy breeding/resident (km2) 1,500 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 22000-32000 good Estimated 2009
Population trend Decreasing medium Suspected -
Number of subpopulations 2-100 - - -
Largest subpopulation - - -
Generation length (yrs) 4.4 - - -
Population justification: The population is estimated at 11,000-16,000 singing males (M. Flade in litt. 2012), equivalent to 22,000-32,000 mature individuals or 33,000-48,000 individuals in total.
Trend justification: This species probably declined rapidly until the late 1990s, as a result of the destruction of its habitat at a rate equivalent to 40% in ten years. The 2015 European Red List of Birds estimated the European population to be decreasing by 30-49% in 13.2 years (three generations) (BirdLife International 2015).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Algeria Native Extant     Yes  
Andorra Unknown Extant     Yes  
Austria Native Extinct Yes      
Belarus Native Extant Yes      
Belgium Native Extant     Yes  
Bulgaria Native Extant     Yes  
Burkina Faso Unknown Extant   Yes Yes  
Croatia Native Extant        
Cyprus Vagrant Extant        
Czech Republic Native Extant     Yes  
Denmark Vagrant Extant        
Egypt Vagrant Extant        
Estonia Vagrant Extant        
Finland Vagrant Extant        
France Native Extant     Yes  
Germany Native Extant Yes   Yes  
Ghana Native Extant   Yes    
Greece Vagrant Extant        
Hungary Native Extinct Yes      
Ireland Vagrant Extant        
Israel Vagrant Extant        
Italy Native Extant     Yes  
Kazakhstan Vagrant Extant        
Latvia Native Extant Yes      
Lithuania Native Extant Yes      
Luxembourg Native Extant     Yes  
Macedonia, the former Yugoslav Republic of Vagrant Extant        
Mali Unknown Extant   Yes    
Malta Vagrant Extant        
Mauritania Native Extant     Yes  
Montenegro Native Extinct     Yes  
Morocco Native Extant     Yes  
Netherlands Native Extant     Yes  
Norway Vagrant Extant        
Poland Native Extant Yes      
Portugal Native Extant     Yes  
Romania Native Extant     Yes  
Russia Native Possibly Extinct Yes      
Russia (Central Asian) Native Possibly Extinct Yes      
Russia (European) Native Possibly Extinct Yes      
San Marino Unknown Extant     Yes  
Senegal Native Extant   Yes    
Serbia Native Extinct     Yes  
Slovakia Native Extinct     Yes  
Slovenia Native Extant     Yes  
Spain Native Extant     Yes  
Sweden Vagrant Extant        
Switzerland Native Extant     Yes  
Tunisia Vagrant Extant        
Turkey Vagrant Extant        
Ukraine Native Extant Yes      
United Kingdom Native Extant     Yes  
Western Sahara Native Extant     Yes  

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Belarus Balota Dzikoje site factsheet
Belarus Balota Zvaniec site factsheet
Belarus Dzivin - Vialiki Lies site factsheet
Belarus Haradzienskaja Svislač site factsheet
Belarus Lelchitsy-Ubort site factsheet
Belarus Mid Prypiac' site factsheet
Belarus Prostyr site factsheet
Belarus Ščara floodplain site factsheet
Belarus Servač site factsheet
Belarus Sporaŭskaje balota site factsheet
Belarus Vyhanaščanskija baloty site factsheet
France Estuaire de la Gironde : marais de la rive nord site factsheet
France Marais de la Baie d'Audierne site factsheet
Hungary Hortobágy and Tisza-to site factsheet
Italy Simeto mouth and middle course and Biviere di Lentini site factsheet
Latvia Liepaja lake site factsheet
Lithuania Flooded coastal meadows near Svencele raised-bog site factsheet
Lithuania Flooded coastal meadows near Tyrai bog site factsheet
Lithuania Flooded meadows near Sausgalviai settlement site factsheet
Lithuania Nemunas delta regional Park site factsheet
Lithuania Tyras site factsheet
Lithuania Zuvintas Biosphere Reserve site factsheet
Luxembourg Upper Valley of the Alzette site factsheet
Luxembourg Valley of the Syre site factsheet
Poland Biebrza river valley site factsheet
Poland Bubnow Marsh site factsheet
Poland Chelm calcareous marshes site factsheet
Poland Delta of the Swina river site factsheet
Poland Kampinos forest site factsheet
Poland Lower Odra river valley site factsheet
Poland Marshy Valley of the Narew River site factsheet
Poland Middle Bug river valley site factsheet
Poland Miedwie site site factsheet
Poland Narew river gaps site factsheet
Poland Ner River Valley site factsheet
Poland Rozwarowo Marshes site factsheet
Poland Siemianowka Reseirvoir site factsheet
Poland Upper Narew River Valley site factsheet
Poland Warta River Mouth site factsheet
Poland Wizna Swamps site factsheet
Russia (European) Kamsko-Yayvenski wetland site factsheet
Russia (European) Neman river Delta and the coast of the Curonian Bay site factsheet
Russia (European) Nizhnekamskaya flood-plain site factsheet
Russia (European) Watershed of Bityug and Tsna rivers site factsheet
Spain Chingudi-Bidasoa estuary site factsheet
Spain Costa da Morte site factsheet
Ukraine Pryp'yat' river valley site factsheet
Ukraine Shats'ki lakes site factsheet
Ukraine Stokhod river valley site factsheet
Ukraine Styr' river valley (Kolky village) site factsheet
Ukraine Supij marsh site factsheet
Ukraine Svydovets protected area site factsheet
Ukraine Syra Pogonya mire site factsheet
Ukraine Turiya river valley site factsheet
Ukraine Udaj river valley site factsheet
United Kingdom Marazion Marsh site factsheet
United Kingdom Weymouth Wetlands site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland Suitable breeding
Artificial/Terrestrial Pastureland Suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands Major breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands Major non-breeding
Altitude 0 - 200 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 Majority (50-90%) Rapid Declines Medium Impact: 7
Ecosystem degradation, Ecosystem conversion
Biological resource use Gathering terrestrial plants / Unintentional effects (species is not the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Ecosystem degradation
Climate change & severe weather Droughts Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Ecosystem degradation
Natural system modifications Dams & water management/use / Large dams Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Ecosystem degradation


Purpose Primary form used Life stage used Source Scale Level Timing
Pets Whole Adults and juveniles Wild International Non-trivial Recent
Pets/display animals, horticulture - - - International

Recommended citation
BirdLife International (2016) Species factsheet: Acrocephalus paludicola. Downloaded from on 21/10/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from on 21/10/2016.

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 Sylviidae (Old World warblers)
Species name author (Vieillot, 1817)
Population size 22000-32000 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 183,000 km2
Country endemic? No
Links to further information
- Summary information on this species
- 2015 European Red List assessment