Deer are you set up right on the edge of the field? If so try backing up away from it. Also do you know where the birds go after they leave the field, again if you do try getting in front of them. You might try a breeding pair of decoys that the toms will see this might get the dominant birds in a snip and head them your way. One other thing you might try is backing up away from the field and doing a fighting purr, everyone likes to watch a fight and this might bring some of the birds your way. Hope this helps