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Article
Thorsten Johannes Skovbjerg Balsby, Auteur ; Poul Hansen, AuteurSong repertoires are often important determining factors in sexual selection. In several species, older males have larger repertoires than 1-year-old males. The development of large song repertoires by an individual is, however, poorly understoo[...]
Article
Goetz Rheinwald, Auteur ; Poul Hansen, AuteurRheinwald, G. 2) mysteriously singing birds could have a genetic defect, eventually leading to temporary deafness. Finally we report some records from other passerine species showing mysterious songs of the same type like Garden Warbler.
