Illinois Butterfly Monitoring Network

Regal Fritillary (Speyeria idalia)

The Regal Fritillary is a butterfly that will not be found at the vast majority of our sites that are monitored. Usually, if you see a large fritillary, it will be the Great Spangled Fritillary. The Regal Fritillary is easy to identify with its dark hind wing. It is only found at a few places in the area, which are usually prairie remnants containing the food plants for the Regal Fritillary caterpillars. In the places where the Regal Fritillary is found, it can often be found in large numbers.

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Regal Fritillary

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