Gunther Zieger

A long-distance migratory passerine breeding from W Europe (Benelux) to W Russia; overwinters in E Africa, reaching S Africa (BirdLife International 2021).

Season of assessment

B

Population trendUnknown
Population size
(min-max, best estimate)		11700000-17000000,14100000
Red List categoryLC
Franks, S., Fiedler, W., Arizaga, J., Jiguet, F., Nikolov, B., van der Jeugd, Ambrosini, R, Aizpurua, O., Bairlein, F., Clark, J., Fattorini, N, Hammond, M., Higgins, D, Levering, H., Skellorn, W., Spina, F, Thorup, K. Walker, J., Woodward, I. and Baillie, S.R. (1) (2022) Online Atlas of the movements of European bird populations. https://migrationatlas.org EURING/CMS (1) Principal investigator
Map

Overall Connectivity for Marsh Warbler

Main NW-SE axis of migration, with apparently high overlap (so weak connectivity) of European populations at winter quarters in E Africa. Few recoveries SW (Iberia, W Africa), especially coming from birds from W Europe. Though possible, some of these birds questioned to be Reed Warblers A. scirpaceus, so caution must be paid to evaluate the importance of this SW flyway. More research in this context is needed. 

Recoveries by Condition for Marsh Warbler

Most recoveries (95%) due to birds recaptured alive (ringing recovery). Extremely few recoveries (N=7) before 1960.

Annual Movements for Marsh Warbler

Breeding quarters left from Jul. Passage through Europe still patent until Sep, some recoveries still in Oct. First recoveries in winter quarters in E Africa in Nov, up to Mar. Spring passage obvious in Apr in Europe. Few birds found to overwinter in Europe, especially in W countries.

Connectivity by Month by Region for Marsh Warbler

In autumn, recoveries within E Mediterranean area/Arabia mostly in Aug-Sep, up to Oct. Birds passing through Sudan already in Aug. Recoveries from Kenya to South Africa majorly in Dec-Jan, though occurrence at winter quarters from Oct to Mar. Recent literature suggests that Kenya is a stopover area, with E European birds likely moving further S in winter (Prochaska et al 2014). Seemingly loop migration, with a higher proportion of recoveries in spring in Arabia, mostly in May. Interesting recoveries E Africa in Dec-Arabia in May, supporting this loop pattern. Passage across SE Europe detected in May. Ringing at breeding quarters mostly concentrated in Jul-Aug.

Juan Arizaga

References

Statistics Map
N records N individuals N recoveries
Mapped data*
Total available data
*Mapped data include only distant (>= 50 km) recoveries
References Map
BirdLife International2021 . Species factsheet: Acrocephalus palustris.
Procházka, P., Kralj, J., Pearson, D. J., Yohannes, E.2014 . Moulting and wintering grounds of Marsh Warblers Acrocephalus palustris: evidence from stable isotopes and ring recoveries. Acta Ornithologica 49: 193–200

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