The Garden Bug: Fritillaries
By Brenda Weaver
The caterpillars of fritillary butterflies hatch in the fall, go dormant right away without feeding, and sleep through the winter. They awaken in the spring at the same time as violet plants, their only food, begin to grow. It is feared that global warming may disrupt this delicate and important synchronization and cause extinction of fritillary butterflies.
Source: www.fs.fed.us