alfalfa butterfly

insect

Also known as: Colias eurytheme, orange sulfur butterfly

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Last updated

June 24, 2026

Quick Summary

The alfalfa butterfly (Colias eurytheme) is an orange butterfly that is the adult form of the alfalfa caterpillar. These butterflies belong to the sulfur butterfly subfamily (Coliadinae), which includes about 300 species known for their bright yellow or orange coloration and wingspans of 1.5 to 2.5 inches.12

The larvae, or caterpillars, of the alfalfa butterfly feed on plants like clover, alfalfa, and soybeans, and can cause significant crop damage. Some female alfalfa butterflies may exhibit white coloration with black margins, differing from the typical orange with black margins seen in males and other females.23

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sulfur butterfly
For example, the alfalfa butterfly (Colias eurytheme) is usually orange with black wing margins, but some females are white with black margins. The larvae are caterpillars that feed on clover and may seriously damage crops, including alfalfa and soybeans.
Read More
For example, the alfalfa butterfly (Colias eurytheme) is usually orange with black wing margins, but some females are white with black margins. The larvae are caterpillars that feed on clover and may seriously damage crops, including alfalfa and soybeans.
Read More