A Volunteer in Action (IMAGE) University of Helsinki Caption This image shows a volunteer in action. Mari Hamppula has installed cages to exclude given decomposer animals from dung pats behind her on the right. She now samples pats used as bait to establish what dung beetle species are present on her home farm. Credit (Photo: Timo Marttila/Satakunnan Kansa) 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.