Jeanner, the rotted fruit really works!
Until I saw your mass display of butterflies, I had never tried enticing the butterflies with fruit. I used one of the large wire suet feeders and filled it about one-third full. The older it got, the more other insects were drawn to it. Fairly soon, the Red-Spotted Purple showed up followed fairly quickly by the Red Admiral and a couple of days later, the Question Mark showed up. All three of these have become regular guests and the Common Buckeye now stops by infrequently. The greatest number of butterflies feeding on the feeder at one time has been five. I attribute the fruit with giving the butterflies cause to remain on the bait even when I get up close and utilize the flash. I would like to share a top view and an underside view of each of the three new butterflies (new for me).
Red-spotted Purple (Limenitis arthemis)
Red Admiral (Vanessa atalanta)
Question Mark (Polygonia interrogationis)