Brown Bat Necropsy (IMAGE) U.S. Geological Survey Caption USGS pathologist Nancy Thomas and technician Dottie Johnson necropsy little brown bat at the USGS National Wildlife Health Center. Credit Allison Klein, NPS Usage Restrictions Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo. 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.