The two day old cygnets take a look under Mom's wings. They have discovered they can hitch a ride if they can just climb up on her back.
While the pen is quite at ease with her two day old cygnets, the cob appears as though he can't quite make out what they are, or where they came from. While he watches over them, he doesn't let them get too close. I've seen this behaviour in other cobs as well.
The two day old cygnets check everything out to see if it's edible.