Butterflies: Orange Sulphur

Photo of Orange Sulphur

Orange Sulphur (Colias eurytheme) butterflies live in fields and pastures throughout New England and have a flight period (mid-May through October) that more or less coincides with the green season. Late in the year, they can be found nectaring on many types of flowers, including New York American-aster (Symphyotrichum novi-belgii, pictured here). Males and females can be told apart by examining the upper wing pattern (see photos below): males have a solid black border; females have yellow spots within a wider black border. Some Orange Sulphurs lack obvious orange coloration and may be impossible to tell apart from the similar Cloudless Sulphur (C. philodice). (To view the following images in full-size, click here.)

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