Marsh Warbler Acrocephalus palustris


Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: # _the_WP15.xls#.
Cramp, S. and Simmons, K.E.L. (eds). 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and 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
2016 Least Concern
2014 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 full migrant Forest dependency Low
Land mass type Average mass -

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 9,490,000
Extent of Occurrence non-breeding (km2) 2,830,000
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 8000000-16999999 poor estimated 2012
Population trend Stable estimated -
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) 4.4 - - -

Population justification: In Europe, the breeding population is estimated to number 4,170,000-7,560,000 pairs, which equates to 8,330,000-15,200,000 mature individuals (BirdLife International 2015). Europe forms c. 95% of the global range, so a very preliminary estimate of the global population size is 8,750,000-16,000,000 mature individuals, although further validation of this estimate is needed.

Trend justification: In Europe the overall trend from 1980-2013 was stable (EBCC 2015).

Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Albania N Extant Yes
Algeria V Extant
Armenia N Extant Yes
Austria N Extant Yes
Azerbaijan N Extant Yes
Bahrain N Extant Yes
Belarus N Extant Yes
Belgium N Extant Yes
Bosnia and Herzegovina N Extant Yes
Botswana N Extant
Bulgaria N Extant Yes
Congo, The Democratic Republic of the N Extant
Croatia N Extant Yes
Cyprus N Extant
Czechia N Extant Yes Yes
Denmark N Extant Yes Yes
Egypt N Extant
Estonia N Extant Yes
Eswatini N Extant
Ethiopia N Extant
Faroe Islands (to Denmark) V Extant
Finland N Extant Yes
France N Extant Yes
Georgia N Extant Yes
Germany N Extant Yes
Greece N Extant Yes Yes
Hungary N Extant Yes
Iran, Islamic Republic of N Extant Yes Yes
Iraq N Extant Yes
Israel N Extant
Italy N Extant Yes Yes
Jordan V Extant
Kazakhstan N Extant Yes
Kenya N Extant
Kuwait N Extant Yes
Latvia N Extant Yes
Lebanon N Extant Yes
Liechtenstein N Extant Yes
Lithuania N Extant Yes
Luxembourg N Extant Yes
Malawi N Extant
Malta V Extant
Moldova N Extant Yes
Montenegro N Extant Yes
Morocco N Extant
Mozambique N Extant
Namibia N Extant
Netherlands N Extant Yes
Nigeria V Extant
North Macedonia N Extant Yes
Norway N Extant Yes
Oman N Extant Yes
Poland N Extant Yes
Portugal V Extant
Qatar N Extant Yes
Romania N Extant Yes
Russia N Extant Yes
Russia (Central Asian) N Extant Yes
Russia (European) N Extant Yes
Rwanda N Extant
Saudi Arabia N Extant Yes
Serbia N Extant Yes
Slovakia N Extant Yes
Slovenia N Extant Yes
Somalia N Extant
South Africa N Extant
Spain N Extant Yes
Sudan N Extant Yes
Sweden N Extant Yes Yes
Switzerland N Extant Yes
Syria N Extant Yes
Tanzania N Extant
Tunisia N Extant
Turkey N Extant Yes
Uganda N Extant
Ukraine N Extant Yes
United Arab Emirates N Extant Yes
United Kingdom N Extant Yes
Yemen N Extant Yes
Zambia N Extant
Zimbabwe N Extant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Belarus Al'manskija baloty
Liechtenstein Ruggeller Riet, Talgebiet
Latvia Pape lake
Romania Satchinez marsh
Romania Socodor wood
Slovenia Ljubljansko moor
Slovenia Ribnica valley
Slovenia River Drava
Slovenia River Mura
Sweden Lomma Bight
Sweden Bay of Rynninge
Sweden Sandemar
Poland Marshy Valley of the Narew River
Poland Pisz forest
Greece Kythira island
Greece Dionysades islets, Crete
Greece Apsalos and Moglenitsa gorges
Greece Filiouri valley and eastern Rodopi mountains
Greece Kompsatos valley
Greece Lake Kourna, Almyros delta and Georgioupolis coast, Crete
Greece Prespa National Park and Varnountas mountains
Greece Southwestern Lesvos and Petrified forest
Greece Kalloni Gulf, Lesvos
Greece Porto Lagos, lake Vistonida and coastal lagoons
Greece Nestos delta and coastal lagoons
Greece Northern Evros and Ardas riparian forest
Finland Mietoistenlahti bay
Finland Rauma and Luvia archipelagos
Finland Koskeljärvi, Vaaljärvi and Pitkäjärvi lakes
Finland Pori archipelago and wetlands
Finland Hanko western archipelago
Finland Porvoonjoki Delta
Finland Teutjärvi and Suvijärvi lakes
Finland Kirkon-Vilkkiläntura Bay
Finland Siikalahti bay and Sammallampi lake
Finland Torronsuo and Lake Talpianjärvi
Finland Päätyeenlahti bay
Finland Outokumpu wetlands
Finland Värtsilä valley
Finland Lapväärti wetlands
Hungary Pacsmag Lakes of Regöly
Russia (European) Buzulukski forest
Russia (European) Zaonezh'ye
Russia (European) Kenozer'ye
Ukraine Sul's'ka bay
Ukraine Petropavlivs'kyj lyman
Ukraine Korotchenkivs'ki meadows
Ukraine Lyman lake
Ukraine Chonovyny marsh
Ukraine Vovk river valley
France Marais de Sacy
Italy Pian di Spagna and Lake Mezzola
Italy River Po: from the mouth of Adda river to Ostiglia
Italy River Po: from Ticino mouth to Adda mouth
Italy Caorle lagoon
Italy Venice lagoon
Italy Taro river
Italy Punte Alberete and Valle della Canna, Pineta San Vitale and Pialassa della Baiona
Italy Valli di Argenta
Italy Lake Candia
Italy River Po from Dora Baltea mouth to Scrivia mouth
Italy Grado and Marano lagoon
Italy Isonzo mouth, Cona island and Panzano Gulf
Italy Lake Maggiore
Czechia Poodri
Sweden Lake Östen
Serbia Gornje Podunavlje
Serbia Jegricka
Serbia Koviljski rit
Serbia Zasavica
Serbia Slano Kopovo
Slovakia Horná Orava
Slovakia Senné
Slovakia Nízke Tatry
Austria Austrian part of Hanság
Austria Southern Seewinkel and Zitzmannsdorfer Wiesen
Austria Lobau
Austria Allentsteig military training area
Austria Middle Kamp valley
Austria Lower Kamp valley
Austria Fish-ponds in the Waldviertel
Austria Machland
Austria Salzach valley
Austria Styrian Joglland
Austria Lower valley of the Gail
Austria Kaisergebirge
Austria Tyrolian Lech valley
Austria Meadows on the lower Ill
Austria Parndorfer Platte and Heideboden
Germany Ponds and Elbe valley near Torgau
Germany Rhön Biosphere Reserve
Germany Saale-Elster valley
Germany Rötelsee-Weihergebiet incl. Regenaue and Chambaue
Germany Altmühl valley between Treuchtlingen and Leutershausen with Altmühlsee
Germany Lowlands of middle Havel
Germany Wagbach lowlands
Germany Borgfelder Wümmewiesen
Germany Blockland - lower Wümme valley - Westliches Hollerland
Germany Werderland
Germany Niedervieland, Ochtumniederung
Germany Mittelwesermarsch
Germany Rieselfelder Münster
Germany Salziger See and Salza valley
Germany Heidmoor lowlands
Ukraine Mzha river valley
Belarus Haradzienskaja Svislač
Russia (European) Sviyago-Kubninskaya forest-steppe
Iran, Islamic Republic of Arasbaran Protected Area
Italy Middle course of River Brenta
Austria Surroundings of Mattersburg
Austria Feuchte Ebene and Rauchwarther Platte
Austria Western Waldviertel
Austria Niederösterreichische Randalpen
Austria Lösslandschaft and Wagram east of Krems
Austria Southern Waldviertel
Austria Freiwald
Austria Storage lakes on the lower Inn
Austria Styrian Enns valley
Ukraine Serednyotomakivske reservior
Austria Riede in the northern Rhein valley
Finland Laajalahti bay, Vanhankaupunginlahti bay and Viikki
Finland Tammisaari and Inkoo western archipelago
Finland Ruissalo
Finland Eckerö and Hammarland archipelago
Turkey İğneada Forests
Turkey Terkos Basin
Turkey Karçal Mountains
Turkey Eastern Black Sea Mountains
Yemen Abdullah Gharib lagoons
Russia (European) Rychkovskaya forest-steppe
Russia (European) Karabash-Kudashskaya forest-steppe
Germany Wümme lowlands Borgfeld-Fischerhude
Germany Elbe lowlands near Bertingen
Germany Peenetal (Peenetalmoor and Anklamer Stadtbruch)
Luxembourg Valley of the Syre
Luxembourg Upper Valley of the Alzette
Luxembourg Haff Réimech
Luxembourg Valley of the Ernze Blanche
Netherlands Rijntakken

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Rural Gardens suitable non-breeding
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable non-breeding
Forest Temperate suitable breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable non-breeding
Grassland Temperate suitable non-breeding
Shrubland Subtropical/Tropical Dry suitable non-breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Shrubland Temperate major breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable non-breeding
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2022) Species factsheet: Acrocephalus palustris. Downloaded from on 23/05/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from on 23/05/2022.