We have five sulphurs that are found in this area. This one is a pink-sided sulphur. Many different sulphurs have a pink edge on their wings that some people associate with the pink-sided but the true way to determine if a sulphur is a pink-sided instead of a clouded or orange sulphur is by the number of spots on the hind wing. Pink-sided sulphurs have a single spot on their hind wing compared to two spots on both the clouded and orange sulphurs. Another clue to help determine the type of sulphur is to look in the habitat for the Caterpillar host plant. Pink-sided sulphur caterpillars only eat blue-berry leaves, so the butterflies are usually found in areas near blueberry. Most other sulphur butterfly caterpillars in this area eat legumes, or members of the pea family.