Found this one on the Globalflyfisher site. Tied here in a freshwater version since I can’t find where I stashed my saltwater hooks; added a wire counterrib to protect that naked ostrich herl.

hook - WFC Model 6 #6
thread - Veevus 6/0 black
rib - ostrich herl rat brown
counterrib - x-small wire silver
body - Ice Dub hare’s ear
collar/head - deer hair dyed olive

Muddler version