Here's my pair of mallards when they were a couple days old in the beginning of April 2016. Now they're adults, and the male flew away or got eaten a few weeks ago.
She is acting differently. We have a few other ducks, and when the male was there, they all stuck together, but now that he's gone, she doesn't stick to the group as tightly as before. She was also very inactive for a couple days right after he went missing.
These are the ducks that started it all. This wild mallard hatched her ducklings in our yard. This was their first outing in our pond. After seeing this I got bit with the duck bug and it was all over.