From Ontario Nature:

Butterfly milkweed is one of multiple milkweed species important to the Monarch butterfly’s life cycle, a species of special concern. Adult females lay their eggs on the leaves, and caterpillars feed on them once they hatch.

The caterpillars can withstand the plant’s toxins and retain them in their bodies, even after metamorphosis, making them unpalatable to predators.

Learn more about how we are working to protect native pollinators: https://ow.ly/BtCO50PSBnO