Anise Swallowtail and Fennel

I have raised too many Anise Swallowtails to count. They are easy to find and easy to raise. The problem is the overwintering. They overwinter as a chrysalis. And sometimes for more than one winter. I had one that finally emerged 7 years later. Wow! Supposedly it is so they spread out their emergence, so at least some of them become adults when there is plenty of rain and plenty of host plant.

Their most common hostplant in urban environments is fennel. It was imported by the missionaries as a food plant, and it is edible. Before they showed up, Anise Swallowtails used Perideridia and Lomation. Also poison hemlock and cow parsnip. But their native host plants were eliminated, and they learned to use fennel. Clever!