Pigeon Genome Opens Door to the Past (3 of 4) (image) American Association for the Advancement of Science Share Print E-Mail Caption This shows striking variation between breeds of domestic pigeons. Left: Old German owl breed with a head crest and short beak. Right: Scandaroon breed with large beak and no crest. Background: Classification scheme for domestic pigeon breeds proposed by Charles Darwin in 1868. This image relates to a paper that appeared in the Jan. 31, 2013, issue of Science Express, published by AAAS. The paper, by Michael Shapiroat University of Utah in Salt Lake City, Utah, and colleagues was titled, "Genomic Diversity and Evolution of the Head Crest in the Rock Pigeon." Credit [Credits:Sydney Stringham (Old German owl) and Mike Shapiro (Scandaroon). Background drawing from Charles Darwin's The Variation of Animals and Plants Under Domestication, 1896 edition] Usage Restrictions Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. 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.