Early In is exactly right. They know the difference in the kind of intrusions they experience. Many times I'll be talking to people and they find out that I hunt, and they'll say, "You should see the deer around my house. They're so dumb I can walk right up to them and get within 30 yards from my driveway." I tell them that next time they see them to step off the driveway, just one step, and see what happens. All they'll see is white flags waving at them.

The deer definitely know how to determine threat levels in their environment around here.