1. Department of Zoology University of Cambridge Cambridge UK
2. Centre for Biodiversity and Environment Research University College London London UK
3. Department of Evolution, Ecology, and Behavior School of Integrative Biology University of Illinois at Urbana‐Champaign Urbana Illinois USA
4. Department of Biosciences Durham University Durham UK
5. Department of Behavioural Ecology and Evolutionary Genetics Max Planck Institute for Ornithology Starnberg Germany