<i>Phengaris nausithous</i> (2 of 2) (IMAGE) Helmholtz Centre for Environmental Research - UFZ Caption This shows a Phengaris nausithous (Dusky Large Blue) pair copulating on a great burnet flower head (Sanguisorba officinalis). Credit Photo: Josef Settele/UFZ Usage Restrictions None 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.