Raccoons are very difficult to track because they become trap shy. A collar will tell you that they're in a backyard, but it doesn't tell you where they are. The baby sounds are the best - sweet and trying to get their mom to give them some food. Other ones always sound like they're being ripped to shreds. If you hear raccoons fighting, you go, well, obviously there's going to be dead raccoons in the morning. There never are.