The Marsh Warbler, Acrocephalus palustris, breeds in temperate Europe and western Asia and winters mainly in south east Africa. It is notable for incorporating striking imitations of a wide variety of other birds into its song.

The Marsh Warbler breeds in a variety of mostly damp habitats, but in Africa winters mainly in dry, well-vegetated areas. It is common over much of its breeding range and expanding its distribution in some areas. However in Britain it is now virtually extinct as a breeding bird. This insectivorous warbler can be easily confused with several close relatives, but the imitative song of the male is highly distinctive.