1. Biology Department, Evolution and Optics of Nanostructures Group, Ghent University, Ghent 9000, Belgium
2. Museum of Comparative Zoology, Harvard University, Cambridge, MA
3. Lund Vision Group, Department of Biology, University of Lund, Lund 22362, Sweden
4. Division of Biodiversity and Evolution, Department of Biology, Lund University, 223 62 Lund, Sweden
5. Ethology Lab, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, 46980 Paterna, Spain
6. Naturalis Biodiversity Center, 2333 CR Leiden, The Netherlands