My normal ruddy duck experience is a large raft far out on the lake of sleeping ducks with heads tucked under feathers and little tails sticking straight up in the air. The tails let you know what kind of duck they are. Then this guy swam by me. My experts say he is a 1st winter male molting out of his juvenile plumage. Thrilled to get a half way decent close up.
Male Ruddy Duck (Oxyura jamaicensis)