Bat Eyes Have Ultraviolet-Sensitive Cone Photoreceptors Müller, Brigitte ; Glösmann, Martin ; Peichl, Leo ; Knop, Gabriel C. ; Hagemann, Cornelia ; Ammermüller, Josef Abstract Publication: PLoS ONE Pub Date: July 2009 DOI: 10.1371/journal.pone.0006390 Bibcode: 2009PLoSO...4.6390M