Data from: Food supplementation mitigates dispersal-dependent differences in nest defence in a passerine bird.

  • Charlotte Récapet (Creator)
  • Gregory Daniel (Creator)
  • Pierre Bize (Creator)
  • Blandine Doligez (Creator)
  • Graeme Paton (Data Manager)



Dispersing and non-dispersing individuals often differ in phenotypic traits (e.g. physiology, behaviour), but to what extent these differences are fixed or driven by external conditions remains elusive. We experimentally tested whether differences in nest-defence behaviour between dispersing and non-dispersing individuals changed with local habitat quality in collared flycatchers, by providing additional food during the nestling rearing period. In control (non-food-supplemented) nests, dispersers were less prone to defend their brood compared with non-dispersers, whereas in food-supplemented nests, dispersing and non-dispersing individuals showed equally strong nest defence. We discuss the importance of dispersal costs versus adaptive flexibility in reproductive investment in shaping these differences in nest-defence behaviour between dispersing and non-dispersing individuals. Irrespective of the underlying mechanisms, our study emphasizes the importance of accounting for environmental effects when comparing traits between dispersing and non-dispersing individuals, and in turn assessing the costs and benefits of dispersal.

Data type

The dataset contains all the biological and behavioural data used in the study. The variables are described within the data file.
Dataset for publication.xls

Copyright and Open Data Licencing

This work is licensed under a CC0 1.0 Universal (CC0 1.0) Public Domain Dedication license.
Date made available1 Apr 2016
PublisherDryad Digital Repository
Geographical coverageGotland Island, Sweden


  • anti-predator behaviour
  • Ficedula albicollis
  • habitat quality
  • parental care

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