Mallard and her ducklings

We received a call from a concerned family.  It seemed a young female mallard decided to nest in one of their flower beds on their balcony.  This balcony was on the sixth floor.  We discussed a variety of options about this situation with the family who found her.  We all agreed on a plan for the mom and ducklings and the family was able to keep them together until they brought mom and her ducklings to us. We were able to keep mom with the ducklings as long as we could.  In the third week she decided to take off and not return.  The ducklings were thriving and were brought to another location where they joined more ducklings for them to finish growing until they were released.