I managed to convince them to go across the lot, up a ramp, and off in the direction of the parkway trail and the river, but boy, cats have nothing on ducks when it comes to herding. You can't get too close or Mama Duck gets angry, and the whole deal is really a duck-herding bureaucracy -- you try to herd Mama Duck, she herds her ducklings, and you hope her idea for her ducklings matches your idea for her.
But the ducks were safely deployed, and I am the duck hero.