1. Division of Ecology & Evolution, Research School of Biology, The Australian National University, Canberra, ACT 2601, Australia
2. Conservation Research, Environment, Planning and Sustainable Development Directorate, Canberra, ACT 2602, Australia
3. School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
4. Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), 6708 PB Wageningen, The Netherlands
5. Vogeltrekstation - Dutch Centre for Avian Migration and Demography, Netherlands Institute of Ecology (NIOO-KNAW), 6708 PB Wageningen, The Netherlands
6. British Trust for Ornithology, Norfolk IP24 2PU, United Kingdom
7. Sovon Dutch Centre for Field Ornithology, 6525 ED Nijmegen, The Netherlands
8. Department of Animal Ecology, Institute for Biological and Environmental Sciences, Radboud University, 6500 GL Nijmegen, The Netherlands
9. College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia