The Fat Albert Tan and Black fly pattern imitates a big, high floating meal that will get the attention of every fish it floats over! This fly can be used to imitate a hopper, adult stonefly or cicada, and is a favorite for fly fishing in South America, where big bugs are the ticket.
So impressed you added Fat Albert to your list of terrestrials.
I was equally taken by the way the body was cupped off the thorax should float up right. Now if you could add some color and antenna, you got it!