I'm glad you said that Bill... When I'm collecting ribbons, it's a 2 handed affair because you can't even gather them before they slip away. I've learned to put bucket in water and swim the ribbons into them.
Now, I will say something about WAE eggs... when we are fertilizing we use goose primary wing feathers to stir sperm and eggs, when you stir for 30 sec to fertilize, you have to leave feather in pan until clay is added to remove adhesive layer, otherwise there will be thousands of fertilized eggs stuck to the feather-different duck though (no pun intended).
In the above article, do we know these to be specifically YP?? Perch is such a loosely used term in some cases, but I'm guessing being it's the European flavor it's the real McCoy..