What are my ducklings doing?
Ducklings and full grown ducks nibble you for a few different reasons. They might be looking for food and are tasting things to try and find some. They may want your attention, when mine want it they bite my pant leg and pull it. Or they may be grooming you because they like you. Unless they lower their heads and making a kind of hissing sound the nibbling isn't anything aggressive, it sounds like they've bonded with you and are just telling you they love you!