I think I've located the general area where they are roosting at. They have a tendency to get real close to my house and the other day as I was coming home, the dog jumped out the window of my truck, ran into the middle of the flock andscattered it pretty good. Will this have any effect on them? Also, do they tend to roost in the same area for a while?

Also, thanks for all the help. You guys have given some good tips. Hopefully I'll have some picures of my Thanksgiving bird for you next weekend.