The Dainty Sulphur, Nathalis iole, with its wingspan of no more than 1 1/4 inch is the smallest Sulphur in the United States They love sunny and dry open areas such as agricultural fields, disturbed areas, and grasslands. You will often find them flitting about in the grass along the side of a road.
Females generally lay a single egg on the upper side of a host plant of Spanish needles or carpetweed. Caterpillars are green with a purple stripe along the back and a pale stripe along the side. They dine at nite on the leaves and flowers of the host plant. In about 23 days, the caterpillar will begin the cocoon stage and emerge 15 days later as a beautiful Dainty Sulpher Butterfly.
Look for Dainty Sulphurs flying just inches above the ground or resting on a flower soaking up the sun.