La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Successful reproduction of a Garden Warbler Sylvia borin singing aberrantly.
Auteurs :	Maria Hoffmann, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (130(3) 2009)
Article en page(s) :	147-151
Résumé :	After two unsuccessful attempts in 2006 and 2007, an abnormally singing Garden Warbler succeeded in pairing and raising offspring in 2008. The abnormal song remained constant throughout the three years. The typical song of Garden Warbler with full tones and organ sound was lacking completely. With numerous chattering short elements given rapidly the song recalled a mediterranean warbler species, so that at its discovery the bird was initially thought to be a Subalpine Warbler Sylvia cantillans. The species specific calls were given only in 2008. Aberrantly singing birds raise questions about the social funtions of song with respect to reproduction. The successful breeding reported here shows that the example of the biological father has to be taken into account when discussing the reasons for Such invalid disposition.

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