Seems like one of the Cygnets prefers being at home with Mum and Dad , rather than the big scary world outside the river.
Slim and Sue have so far not chased it away, just the occasional nibble when it gets too close to them eating.
Weather conditions are almost spring like, so it wont be long before they escort the wee one away again.
Meanwhile it's enjoying the fresh snow water baths, and the security of parents and food supply !