We enjoy watching the squirrels in our back yard. Yesterday morning I looked out and one squirrel was slumped over a branch and another was laying on a branch below it. I thought the one over the branch was dead. It didn't move for a long time. I got out the camera, took the screen off and opened the window to take pictures and still no movement. Maybe 20 minutes after I first noticed it they both finally woke up and ran off. Strangest thing I have seen them do yet. It was quite interesting.