There are a few Question Mark butterflies that like my deck pots.
The Hummingbird feeders drip a bit and the sugar water is a food source. The metallic "question mark" marking on its hind wing gives it its name and is a good way to identify. It has angular wings and is one of many angle wing butterflies.
The Question Mark measures from 2.25-3 inches and has dramatically edged and pointed wings.
This Question Mark is in his summer colors. I began studying the Question Mark Butterflies last Autumn when I noticed them in my gardens.
I am going out to see if I can find an Eastern Comma for comparison. I like butterfly hunting in my own backyard.