Orange Sulphur Butterfly...
Orange Sulphurs (Colias eurytheme), which is also known as the Alfalfa Butterfly, range coast to coast in the United States from Southern Canada to central Mexico, except for the Florida peninsula, and is considered one of the most widespread and common butterflies in North America.
Females lay their eggs in clusters on leaves of asters. Larvae feed on aster foliage. Caterpillars are brown with yellow bands and many branching spines; last brood overwinters. Chrysalis is mottled gray, yellow and brown. There are usually several broods per season. The caterpillar hosts plants are in the pea family (Fabaceae) and include alfalfa (Medicago sativa), white clover (Trifolium repens), and white sweet clover (Melilotus alba).
The adult butterfly feeds on nectar from many kinds of flowers including dandelion, milkweeds, goldenrods, and asters.
Habitat typically includes a wide variety of open sites, especially clover and alfalfa fields, mowed fields, vacant lots, meadows, and roadsides.
ISO200, aperture f/5.8, exposure .004 seconds (1/250) focal length 300mm