Ornithologist Kevin Johnson, University of Illinois at Urbana-Champaign (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption Kevin Johnson, an ornithologist with the State Natural History Survey at the University of Illinois, led a study that found that the ancestors of lice that now prey on birds and mammals were likely around before the dinosaurs became extinct. Credit L. Brian Stauffer Usage Restrictions Photo may be used only with stories about the research described in the news release. Please credit: L. Brian Stauffer Share Print E-Mail 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.