When to be a dear enemy: flexible acoustic relationships of neighbouring skylarks, Alauda arvensis 

@article{Briefer2008WhenTB,
  title={When to be a dear enemy: flexible acoustic relationships of neighbouring skylarks, Alauda arvensis
},
  author={Elodie F. Briefer and Fanny Rybak and Thierry Aubin},
  journal={Animal Behaviour},
  year={2008},
  volume={76},
  pages={1319-1325}
}
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