This is to everyone interested in getting older ground nesting juveniles to roost up. Go out after dark when birds are roosting on the ground, then disturb them spread them about, Even hold some upside down so they complain a bit. Do not put them back together in original spot or in location you want them to adopt as they may want avoid location they wake in the next day when going to roost. This simulate what a predator does that causes them to move roost location.