Sparrow (IMAGE) BMC (BioMed Central) Caption This is a sparrow. Credit Please credit 'Griggio et al., BMC Evolutionary Biology' Usage Restrictions Please credit 'Griggio et al., BMC Evolutionary Biology' 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.