Red Arse Pheasant Tail Euro Nymph.
This is a great pattern from Nymphing The New Way. It's from the fly box of top American Angler Cody Burgdorff. It's a great pattern fished on the dropper or under a dry fly.
Material list:
Hook: Grub hook size 14-18
Bead: Copper
Tail: A barred white feather
Butt: Glo brite no 5
Rib: Copper wire
Body: Pheasant tail
Hackle: CDC
Thorax: Hare