1. Research Group Evolutionary Ecology of VariationMax Planck Institute for Ornithology Seewiesen Germany
2. Center for Biodiversity DynamicsNorwegian University of Science and Technology Trondheim Norway
3. School of Natural ResourcesUniversity of Nebraska‐Lincoln Lincoln NE USA
4. Department of Behavioral Ecology and Evolutionary GeneticsMax Planck Institute for Ornithology Seewiesen Germany
5. Behavioural EcologyDepartment of BiologyLudwig‐Maximilians University of Munich Planegg‐Martinsried Germany