From: Ben Creisler bh480@scn.org In case this paper has not been mentioned yet: Hone DWE, Tischlinger H, Xu X, Zhang F (2010) The Extent of the Preserved Feathers on the Four-Winged Dinosaur Microraptor gui under Ultraviolet Light. PLoS ONE 5(2): e9223. doi:10.1371/journal.pone.0009223 http://www.plosone.org/article/info%3Adoi%2F10.1371% 2Fjournal.pone.0009223