Five Cygnets

I found these this morning on the bank of a pond in a wildlife park close to Par beach.  The mother was very close by on the grass, and the male bird was swimming slowly up and down nearby, on guard.  On arriving at the pond I only had to spot the male bird swimming close to the bank to find out where the cygnets were.  The mother was fine with people being close by, but as soon as she saw a dog or dogs she went on the defensive and hissed at them.