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Acrocephalus palustris 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Acrocephalidae

Scientific Name: Acrocephalus palustris
Species Authority: (Bechstein, 1798)
Regional Assessments:
Common Name(s):
English Marsh Warbler
French Rousserolle verderolle
Taxonomic Source(s): 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.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Butchart, S., Ekstrom, J., Symes, A., Ashpole, J
Justification:
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Previously published Red List assessments:

Geographic Range [top]

Countries occurrence:
Native:
Albania; Armenia (Armenia); Austria; Azerbaijan; Bahrain; Belarus; Belgium; Bosnia and Herzegovina; Botswana; Bulgaria; Congo, The Democratic Republic of the; Croatia; Cyprus; Czech Republic; Denmark; Egypt; Estonia; Ethiopia; Finland; France; Georgia; Germany; Greece; Hungary; Iran, Islamic Republic of; Iraq; Israel; Italy; Kazakhstan; Kenya; Kuwait; Latvia; Lebanon; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Malawi; Moldova; Montenegro; Morocco; Mozambique; Namibia; Netherlands; Norway; Oman; Poland; Qatar; Romania; Russian Federation; Rwanda; Saudi Arabia; Serbia (Serbia); Slovakia; Slovenia; Somalia; South Africa; Spain; Sudan; Swaziland; Sweden; Switzerland; Syrian Arab Republic; Tanzania, United Republic of; Tunisia; Turkey; Uganda; Ukraine; United Arab Emirates; United Kingdom; Yemen; Zambia; Zimbabwe
Vagrant:
Algeria; Faroe Islands; Jordan; Malta; Nigeria; Portugal
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:2830000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population: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).
Current Population Trend:Stable
Additional data:
Number of mature individuals:8000000-16999999Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:This species favours rank, tufty and fairly tall herbage, especially nettles (Urtica), meadowsweet (Filipendula), brambles (Rubus fruticosus) and others, often in the vicinity of taller bushes or trees. It also occurs in corn fields and other agricultural land surrounded with a belt of low bushes or hedgerows as well as in wasteland with tall grass, herbs and small bushes, in tall herbaceous vegetation along ditches, in marsh vegetation at edges of swamps, in reeds on dry ground and even in gardens. In western and central Europe, breeding occurs from the second half of May to July. It lays three to six eggs in a nest which is a deep, cylindrical cup of leaves and stems of nettles, grass and other plants, lined with finer plant fibres, plant down and hair. The structure is supported on two to five plant stems, usually 30–70 cm high (Dyrcz 2006). It feeds mainly on insects and arachnids, with some snails and occasionally berries in late summer and autumn (Snow and Perrins 1998). The species is migratory, wintering in south-east Africa (Dyrcz 2006).
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):4.4
Movement patterns:Full Migrant

Threats [top]

Major Threat(s): In the U.K., declines during the 1950s and 1960s may have been due to climate change and habitat loss as a result of activities such as bank tidying (Batten et al. 1989). The species is likely affected by climate change (Both et al. 2010).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
CMS Appendix II. Bern Convention Appendix II. There are currently no known conservation measures for this species.

Conservation Actions Proposed
Sites should be protected and managed and in Britain the control of birdwatchers to reduce disturbance may be necessary (Batten et al. 1989).

Citation: BirdLife International. 2016. Acrocephalus palustris. The IUCN Red List of Threatened Species 2016: e.T22714741A87577326. . Downloaded on 25 March 2017.
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