Affiliation: | 1. Groningen Institute for Evolutionary Life Sciences, University of Groningen, Nijenborgh 7, 9747 Groningen, the Netherlands;2. Avian Sleep Group, Max Planck Institute for Ornithology, Haus 5, Seewiesen 82319, Germany;3. Institute of Neuroinformatics, University of Zurich, Winterthurerstr. 190, 8057 Zurich, Switzerland |