One of our most recently collared squirrels, 315, was found dead, cached under a leaf pile. Veteran squirrologist Cory reported fresh fox prints nearby. Close inspection showed no wounds. She was a really really big squirrel: 1.7 lbs (769 g). This squirrel was tracked crossing a major road passing through campus (with 40 mph speed limit). I would have guessed cars on the road to be more dangerous than fox. Guess I was wrong.