Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
maybe a bucktail bodied inchworm type fly that used to be popular before foam became regularly used for terrestrials?
Roger...Are you sure that these guys (insects) are not somehow smarter than we are and are just playing dumb waiting for our species to peter itself out and the planet will then be all theirs?