Stan I understand your point completely. If you have birds working a field you can concentrate them with a Mojo. I use one on a 18' conduit pole. Like to put it along a hedge row where they work through a shallow point or on a hill in the center of the field. It just draws them like a magnet to funnel them into my shooting zone.
We have a good number of birds right now with zero hunting pressure. You just need to find where the migration is roosting if you can't find where they are feeding. With so much feed around I work backwards. Have a thicket with a lot of Eastern Cedar trees in it that holds dove well in cold weather. But as we all know Dove are where you find them this time of year.