Sulfur butterflies are yellow or orange and they may or may not have dark margins along the inner sides of their wings. If they do, they are called clouded. Cloudless sulfurs do not have the dark ...

The dainty, yellow-white Common Sulphur (Colias philodice) is among the first of butterfly species to be seen a-fluttering in spring, and one of the last to remain active late into the fall. It is ...