Nope, wind does though. High tide they are just back in the grass where you can conceal better or leave them in large rafts in open water. An incoming tide will kick them up off the flats and get them flying around. A lot depends on weather conditions and time of day. Many times they feed inland and head to the bay in the am. Loaf for a bit and start bouncing around. A good wind will push them back inland. Otherwise they will raft up for a good portion of the day and head back to the fields in the evening. Usually 10 minutes after legal shooting, unless stormy and it will be the last 45 minutes of legal or earlier.