Before you leave home, grab binoculars, a notebook, a topo map, and a GPS. Bring lunch too, since this is an all-day project. At dawn, drive the roads, periodically stopping to listen or to get out of the truck and walk to a high vantage point. Mark the roosted birds you hear on a map or with a GPS. If you hear a bird fly down, listen, or use a crow or owl call to keep him gobbling to learn what route he travels first thing in the morning.