Some butterflies prefer sap and ripe fruit to nectar, these include the Hackberry Emperor and Question Mark. Hot Springs National Park is suffering from a drought and the once abundant seasonal Wildflowers have not arrived. The extreme weather conditions have left the sap eaters at an advantage. They do however compete with Ants as you can observe in the video below. I suspect the Butterflies are feasting from the openings created by the hard working Ants.
Love to ALL!