I think if Dave and I and Theo are on the same wavelength, a rolling spawn could be described as a situation whereby fish completing their spawn and leaving the nesting ground are replaced by fish that are just beginning to spawn either because of late readiness or late maturity. The spawn never really ends because there are always at least a couple of active male nests. It's maybe even conceivable that certain individuals may participate more than once during a spring/summer "rolling spawn". If the spawns are clearly distinct from one another, then the spawning ground would be completely abandoned for a period of time.

Probably in it's truest sense, many fish participate in rolling spawns (for short time frames), but as we're trying to describe it here
it may include a period of time that encompasses possibly as long as a few months.

Holding a redear sunfish is like running with scissors.