Cryptic vs. Camouflage (IMAGE) University of Utah Caption Pigeons defend themselves against lice by preening. Conspicuous lice are more likely to be picked off by prying beaks. Credit Sydney Stringham Usage Restrictions reuse with attribution 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.