An unexpectedly long history of sexual selection in birds-of-paradise Irestedt, Martin ; Jønsson, Knud A. ; Fjeldså, Jon ; Christidis, Les ; Ericson, Per GP Abstract Publication: BMC Ecology and Evolution Pub Date: 2009 DOI: 10.1186/1471-2148-9-235 Bibcode: 2009BMCEE...9..235I