Study region and experimental setup (IMAGE) Pensoft Publishers Caption Study region and experimental setup. Twenty-one pairs of grassland (green) and sunflower (yellow) fields were selected across the study region in Southwest France. Study landscapes (500 m radius around the edge between the two fields in each pair) are indicated by red circles. Credit Jeroen Scheper, Isabelle Badenhausser, David Kleijn, et.al. in PNAS journal. 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.