Geo motion helps early with ducks but by the seasons end mojo decoys are danger flags to ducks. I like them for the first few days in dove season but tend to shut them down or use a add on a friend made for them which allows the wings to cycle for a few turns and then stop for five seconds. Gives the impression of a dove flying along in a lazy manner. Just beating enough to go a little farther. Heck mojos work too well at getting birds down low. That's why I put mine up high. Rather have a dove buzzy him up 15' than at two feet. Safety first on those low birds.