In his March 2017 newsletter, Hardy Fox says :
Much like The Residents, the Delta Nudes never existed. It was a loose assortment of people who got together and made noise, and never bothered with a name. The name was added only recently out of needing a convenient way to designate the time period.
But found in that group were the people who were to become The Residents, the man who would later become Snakefinger, and a handful of other regulars :
The Real Fifth Resident
This is the person we always counted on to do everything without ever
requiring to be the center of attention.
A big heart and a ready smile. Diane Flynn.