Cloudless Sulfur Butterflies are large yellow butterflies with
wing span of 1 7/8 - 2 1/2 inches. They are strong flyers and can migrate long
distances. Males are usually solid yellow above and below and have few visible
markings. Females may be yellow, orange-yellow or white, and they have a faint
dark border on the upper surface of their wings.
Cloudless Sulfur Butterflies are found throughout Arizona.
Cloudless Sulfur Butterflies live in open sunny areas including
parks, yards, gardens, beaches, road edges, abandoned fields, and scrub.
Females lay eggs singly on the leaves or buds of host plants (Cassia species in
the pea family) on which caterpillars later feed. Adults fly from late March
through early January in Arizona and will feed on the nectar from many
different flowers with long tubes including cordia, bougainvilla, cardinal
flower, hibiscus, lantana, and wild morning glory.