Showing off Pigeon Patterns (IMAGE) University of Utah Caption Senior author Mike Shapiro (left), holds a pigeon with the ancestral "bar" pattern on its wing feathers, named for the two horizontal stripes on the wing tips. Lead author Anna Vickrey (right) holds a bird with the checker pattern. Credit University of Utah Usage Restrictions non commercial 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.