To attract fruit loving butterflies, he recommends:
"Place an overripe banana on a dish and split it open to expose the mushy flesh. Place the container outside in dappled light, preferably off the ground to avoid ants. Before long, you might see butterflies checking out the sweet, gooey, fermenting treat. Question marks, red admirals, red spotted-purples, hackberry and tawny emperors are a few of our native species that are readily drawn by the goopy offering.
I use bananas regularly because they’re cheap, but many other fruits are just as enticing to your winged guests. Plums, pears, mangoes, cantaloupe and watermelon are just a few of the options. The type of fruit isn’t as important as that it be a bit overripe. It is the sweet, fermented juices that the butterflies seek. Sometimes the insects become inebriated, which can allow a very close look at them as they feed."