1. Paläontologisches Institut und Museum, Universität Zürich, Karl Schmid-Strasse 4, 8006 Zürich, Switzerland
2. AVIAN Behavioural Genomics and Physiology Group, IFM Biology, Linköping University, 581 83 Linköping, Sweden
3. Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia