I scared a baby duck away from its nest, will its mother look for it?

I was hiking and walked passed a bush. Heard a rustling, so I investigated it, and a mother duck with babies flew out. One of the babies flew in a different direction, and landed on the pond. He swam across the pond super fast and was quacking franticly. I saw him go under but I didn't see him come up...I think (hope) he made it to the other side. After a few minutes, I saw the mother with her other 2 babies head his direction. Do you think she will find the lost duckling? I don't know how ducks are, so is it in their nature to look for their baby if it gets lost? I feel terrible for disturbing the nest.