P41 mountain lion nocturnal (IMAGE) University of California - Davis Caption P41, the most nocturnal mountain lion in the study, lived in the Verdugo Mountains near Los Angeles, an area with high levels of human recreation. Credit National Park Service Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.