I was walking along the canal in Broad Ripple and found a huge group of ducks and geese.  While most of the them were huddled together, chasing bread crumbs and swimming there was this group of four ducks swimming off by themselves.

The two white and two black seemed to move like they had been swimming together for along time.   Family?  Can you have such different ducks in the same brood?  If not, they reminded me of two old married couples.