That said, GPS collar data has shown deer doing some really bizarre things. One of the most common bizarre behaviors is termed the "walkabout." It has been noted in many GPS collar studies that virtually all bucks 2 1/2 or older, at some point during the rut, go on "walkabout." They simply take off and walk in virtually a straight line for several miles. They then spend 48 hours in that new location, after which they return along the same route back to their normal range. What are they doing at that new location for 48 hours? Are they breeding a doe? If so, how did they know she was there, miles away? Again, no one really knows why bucks do this or why they choose the direction they go.
Another odd behavior is the rut range shift. Some bucks up and leave their normal range and shift to a new range miles away, staying only for about the peak 6 weeks of the rut. Afterwards, they return to their original range. How did they know to go to this other range for the rut, and why? To make matters even more strange, some of these rut range-shifting bucks never go back to the same rut range twice. They move to a separate and different rut range every year. Why? Why choose the location they go to?