The Cloudless Sulphur or Cloudless Giant Sulphur, is a mid-sized butterfly.
The male butterfly is clear yellow above and yellow or mottled with reddish brown below and the female is lemon-yellow to golden or white on both surfaces, with varying amounts of black spotting along the margin and a black open square or star on the bottom forewing. The wingspan is 2.5–3.1 inches.
We see this butterfly here a lot in the warm months. They are fast movers and have an eratic flight. The adult butterfly feeds on nectar from many different flowers. Common habitats of this butterfly are open spaces, gardens, seashores, and watercourses.
References and Additional Information
 Wikipedia: Phoebis sennae (Sulfur Butterfly)