Snake-mimicry
Guides
Papilio
Common Swallowtails
Papilio is a large genus of swallowtail butterflies containing approximately 200 species, representing the sole genus in the tribe Papilionini. The genus includes some of the most recognizable butterflies worldwide, such as the Old World swallowtail (P. machaon), western tiger swallowtail (P. rutulus), and eastern tiger swallowtail (P. glaucus). Modern taxonomic revisions have consolidated numerous former genera—including Pterourus (tiger swallowtails), Heraclides (giant swallowtails), and Achillides—into Papilio, making it one of the most diverse butterfly genera. The name derives from the Latin word for butterfly.
Papilio troilus
Spicebush Swallowtail, Green-clouded Butterfly
Papilio troilus, the spicebush swallowtail, is a black swallowtail butterfly native to eastern North America. Adults are primarily black with distinctive green-blue (male) or bright blue (female) half-moon markings on the hindwings, along with cream-yellow spots and orange basal patches. The species exhibits two subspecies: the widespread P. t. troilus and the Florida-endemic P. t. ilioneus. Larvae are notable for their dramatic ontogenetic color change, shifting from bird-dropping mimicry in early instars to snake-mimicry with large eyespots in later stages.