The Sleepy Orange is of the Sulphur (or Sulfur) subfamily of butterflies. There are about 300 species worldwide and about 36 in North America. They are usually bright yellow or orange, some species have two color patterns. Males have brilliant UV reflections that the females lack. This Sleepy Orange Sulphur has a drowsy appearance in flight, dull markings on underwing and a “closed” dot on tip of forewing. They host on various plants including senna and pea plants. The eggs are yellow, then turn red. The caterpillar is fuzzy gray-green with white side stripes.