Maria Prager, University of Gothenburg (IMAGE) University of Gothenburg Caption Maria Prager is the author of the thesis, "Phylogeny and Signal Diversity in Widowbirds and Bishops (Euplectes spp.)" Credit Staffan Andersson Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.