Repertoire matching between neighbouring song sparrows

@article{Beecher1996RepertoireMB,
  title={Repertoire matching between neighbouring song sparrows},
  author={Michael D. Beecher and Philip K. Stoddard and Elizabeth Campbell and Cynthia L. Horning},
  journal={Animal Behaviour},
  year={1996},
  volume={51},
  pages={917-923}
}
A male song sparrow,Melospiza melodia, has a song repertoire of about eight or nine distinct song types, and he typically shares several of these song types with each of his several neighbours. In the prevailing theoretical view, the song types in a bird's repertoire are interchangeable and multiple song types exist primarily to provide diversity. The present study was designed to test a contrary hypothesis concerning one particular context, counter-singing between neighbours. Specifically, the… 

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