Catch black thread in about the middle of the size 6 3XL streamer hook and bring it back close to the bend.
Take a medium tuft of purple saddle hackle fibres for the tail. Measure the length before you snip anything - this one wants a long, meaty tail - then take a couple of wraps, check it, and add more wraps to secure.
Strip a little fibre off the end of the medium orange chenille to bare the thread core, bind it in and take two or three wraps for a big butt. Catch it off on the underside and smooth the wraps out.
Bring the thread up front and bind in size 12 silver Mylar tinsel there, silver side toward the hook, so there is no extra lump at the back.
Bind in two strands of black ostrich herl and wrap them forward as far as they reach - about halfway - then back the wraps off, catch the herl in and snip.
Catch in two more strands of herl and wrap them forward to the thread, stopping short enough to leave room for the front chenille. It does not matter that they mat down; the rib flattens them anyway.
Rib the tinsel forward over the herl body, catch it off with a couple of wraps, then fold the tag back over itself and add locking wraps. The fold makes the rib far more durable in fishing.
Wrap a second thorax of the same orange chenille in front of the body, a shade bigger than the butt, to help prop the wing up.
Stack a small to medium tuft of squirrel tail and bind it in as a wing reaching about the middle of the tail, adding a few extra wraps to lock it in.
Snip the butts as close as you can, push them up with your thumb, and build a big head, leaving room for a tippet through the eye. Whip finish and cover the head with UV resin or head cement.