Michal POLAKOWSKI, Monika BRONISZEWSKA, Lukasz JANKOWIAK, Tomasz COFTA

Hybridisation or vocal mimicry? A case of a mixed singing River Warbler Locustella fluviatilis in eastern Poland

The unusual mixed song of a River Warbler (Locustella fluviatilis) was recorded in eastern Poland. The identified male used 2 types of songs recalling the River Warbler and the Grasshopper Warbler (Locustella naevia) alternately, which was confirmed by the interpretation of the sonograms. The most likely explanation of this unusual song is vocal mimicry, caused by the exposure of the recorded individual to the song of the Grasshopper Warbler in its acoustic environment at an early stage of its life.

Anahtar Kelimeler:

Key words: River Warbler, Grasshopper Warbler, vocal mimicry, hybridisation

Hybridisation or vocal mimicry? A case of a mixed singing River Warbler Locustella fluviatilis in eastern Poland

Keywords:

Key words: River Warbler, Grasshopper Warbler, vocal mimicry, hybridisation,

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