Perry is well known in philosophy circles as an influential, widely published author. He has published over 100 books and articles on topics ranging from philosophy of language to philosophy of mind to metaphysics.
Until late 2009, it had never been seen. The only clues of its existence were fecal matter, slain deer and some paw prints discovered in 2005. Motion-activated cameras set up in 2006 never snapped a photograph of it. But in late 2008, Trevor Hebert, Jasper Ridge geographic information systems and data manager, began an experiment, installing a new motion-activated camera. Almost a year later, a photograph finally surfaced. The clues were confirmed. There was at least one mountain lion roaming Stanford’s Jasper Ridge Biological Preserve.