Make the two-tone body first: coat one face of a piece of 1.5mm craft foam with E6000 contact cement, spread it to full coverage, press a second colour onto it and weight it flat overnight. Then punch or cut the hopper shapes out with a die or scissors.
Mount a size 8 3XL curved-shank hook and catch the black thread on somewhere in the back third of the shank.
Lay the foam body along the top and bind it down at the first natural indentation with several tight wraps, lifting the foam and going under then over it a couple of times so it cannot spin on the shank.
Advance the thread a little and bind the next indentation just as tightly to make a second body segment, then go forward another wrap.
Take the third tie-down with loose wraps only - cinching it down here props the wing up too high. Then go forward and catch the little nub at the front, which is what really secures the foam. Bring the thread back to the wing and leg station.
Wing: lay a small tuft of squirrel tail in unstacked so it stays a bit dishevelled, and hold it down with loose wraps so it lies flat rather than propping up.
Trim the squirrel butts fairly short, leaving little nubs, then wrap over them and in between them to lock the wing in place.
Advance the thread and bind in two brown furnace hackle feathers at the front; the feathers are short, so two of them give enough density for the front hackle.
Go back to the squirrel tie-in segment and bind one strand of brown rubber leg with two loose wraps. Position the legs out to the side and slightly below before adding enough medium wraps to hold them.
Return to the front and wrap the hackle five or six turns, then secure it with a couple of wraps. Lick your fingers, sweep everything back to open a flat spot, whip finish, and snip the hackle excess.
Open the front legs up and trim them to size, front legs a little shorter than the back.