Then over subsequent days I've looked out for them. The injured cygnet can be found alone at times, or hanging around with the family. When he's with the family he's like an outsider - he probably feels better with them, but his siblings have pecked at him for some time, and the adults are now pecking away at him at times too. I think they see him as a bit of a "drag". In this first photo you can see three of his siblings about to harass him for getting in their way. His other problem right now is that he isn't as big as the others - I assume because he has more trouble eating and is using more energy swimming. There must also be benefits from being in the group that he is missing out on.
His leg remains useless. he does seem to be able to move it a little, but I suspect it is dead from halfway down. So, when he's swimming he tends to drape it on his butt which must reduce drag. He has an ungainly and lopsided stroke, a little like someone swimming side-stroke. His right leg must be getting very strong.
He must also be getting more independent than the others, given their usual exclusion of him, and they way they disappear without him. However, I suspect this is not overall a good thing.
This one of his siblings is clearly larger, sleeker and more mature. The injured cygnet remains fluffier, and overall a little shabbier. The uninjured cygnets are developing their darker plumage quite obviously.
Anyway, he always seems to catch up with the family again. Here he is early this morning - a bit peripheral, but swimming along gamely nonetheless. I'm interested to see if he can survive - I assume not, but then I thought he'd be dead by now.