In many regions, the Eastern Tiger Swallowtail (Papilio glaucus) appears at the same time that monarchs arrive. This large, yellow butterfly does not migrate. It spends the winter in the chrysalis stage. The adult emerges in the spring after sufficient warmth, usually about the same time that lilacs bloom. The swallowtail gets its name from the tiny "tails" on its hindwings that look like the feathers of swallow's tail. The Eastern Tiger Swallowtail is called "tiger" because of the four black stripes on the male's forewings.
Image: Elizabeth Howard
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