An Eastern Tiger swallowtail (Papilio glaucus) butterfly drinks from a thistle.
An Eastern Tiger Swallowtail (Papilio glaucus) drinks from a thistle. The thistle is a notoriously tough flower. Traditionally, people have tried to eradicate it as a weed, but if you don't have livestock in your yard, you can use it to accent the mid-height plants in your garden.
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