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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Netherlands Rijntakken
Russia (European) Buzulukski forest
Russia (European) Karabash-Kudashskaya forest-steppe
Ukraine Mzha river valley

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 (2023) Species factsheet: Acrocephalus palustris. Downloaded from on 07/06/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 07/06/2023.