Jay,
You are right about the female caddis. I meant to say that my post referenced mayflies. And, "winged Wets" are generally tied to imitate mayflies - not caddis.
But, even with a diving female caddis, when dead, they float.
I am also not talking about any insect in the film, but rather at the location one would be fishing a " winged wet" in the water column.
Thanks for pointing that out.