Primarily found in Central America and Mexico, the band-celled sister (also known as the Mexican sister) is a beautiful brushfoot butterfly related to admiral butterflies. It has a range that extends from the very southern tip of Texas to Columbia and Venezuela where it feeds on nectar from Cordia, Croton, and Baccharis flowers, and sometimes rotting fruit. This one was photographed on a hot summer day near Weslaco, Texas in the Rio Grande Valley.