Black bears are roaming around all the time. It's hard for me to tell exactly where they'll be since they move so quickly and can cover a huge area of land in just a day.
Today, it was obvious that a bear had been around one of my cameras. There were scratches and paw prints all over the area. Walnuts from a nearby tree were smashed open and I could just tell the area was messed with by something big.
Of course the time stamp is wrong. Even if I switch the camera to the correct date, it still seems to go wrong when the camera enters "sleep" mode.