Alfalfa Butterfly (6)
|This is an Orange Sulphur, AKA Alfalfa Butterfly. As with many Sulphurs, eurytheme's wing pattern and coloration is sexually differentiated. Although it is a resident representative of this genera, Colias eurytheme may also be migratory. In southern fields of Alfalfa and clovers, Orange and Clouded (C. philodice) Sulphurs can become quite numerous and are considered agricultural pests.|
Identification: Males have bright orange upper wings with solid black borders. Spring generation may be smaller with yellow top wing having only a small patch of orange shading in the middle of the wings and a narrower black border. Females have yellow spots in the black border and white females are commonly encountered. Both sexes have a black spot on the top and bottom forewing, and an orange spot on the top hindwing. Also, the undersides of both fore and hindwings have a row of small brown dots near the margin and, on the hindwing, a pink rimmed silver spot. Wingspan: 34-55 mm.
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