Goose and turkey primaries get my vote for the best out there, but the secondaries make servicable arrows as well.
I also like pheasant primaries - longer and stiffer than duck - and I can chop standard profiles out of them. They don't hold up as well as wild turkey in the long run, but they're free for me and I have somewhere around 30 pheasants worth of primaries sorted in bags waiting to be ground.
The only way I've had duck make an acceptable fletching is making them a low profile 4" banana. There not as durable, but they do work and well enough for me to collect them.
Something a little odd (by today's standards) is a 3, 4, or 5 tangential fletch with secondary feathers of smaller birds. I did one out of pheasant recently. A little louder in flight than a standard fletch, but point of impact was the same so it wasn't slowing the arrow down any more. I'll be doing some small game arrows like that for the fun of it.