butterflies eat nectar from flowers with it's proboscis. Ussually, they eat nectar from aster, cosmos, thistle, and buttonbush flowers.
plants
The tiger swallowtails eat a wide variety of nectar from different plants; as caterpillars, they feed on willows, alders and cottonwood trees.
Necter, as do all Butterflies.
they eat nectoren fromplants