The females show up of their own accord. One of my favorite strategies is to target female bluegills who are often staged just off the actual spawning site in deeper water. I've never witnessed a male leave the nest and come back with a female in tow, but I have seen them get pretty showy (spinning, flaring, etc,) when a female is in the vicinity.

An absolute classic, from a departed friend: http://www.sdstate.edu/nrm/outreach/pond/upload/The-Secret-Life-of-Bluegill-Jul-Aug-2005.pdf

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.