Tails and Shucks have very important role apart from aesthetics . They support fly or add some trigger points so fish would attack our fly more readily.
Tails add to buoyancy of the fly if the are tied properly. They also provide adequate footprint of our fly...
Shucks add a bit of shine and translucency which tells fish there's a fly struggling on the surface which equals to easy meal...
I know its long one, again... but its worth of your time.
Hope you liked this one
Stay safe
Cheers
Vladimir