- Acrocephalus palustris
- Olive-brown upperparts
- Paler underparts
- Whitish throat
The sexes are identical
Immature: more rufous upperparts and yellower below
Found in areas of dense vegetation; nettles, reeds etc beside streams and ponds, with taller bushes nearby particularly as perches for singing.
Three to six eggs are laid in a nest in reeds or low vegetation.
Diet includes insects, and occasionally berries in autumn.
Well known for mimicking other species of birds.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
- Royal Society for the Protection of Birds
- Collins Pocket Guide to British Birds 1966
- Birdforum Member observations
- BirdForum Opus contributors. (2023) Marsh Warbler. In: BirdForum, the forum for wild birds and birding. Retrieved 24 September 2023 from https://www.birdforum.net/opus/Marsh_Warbler
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