This is the photo of Spicebush swallowtails caterpillar.

Spicebush swallowtails, "Papilio troilus", are butterflies that have a conspicuous tail on each hind wing. The forewings and body are black. The wings have a row of white spots near the outer margin and another small row on the margin. The hind wings are black with two orange spots, two rows of white spots and a conspicuous pale bluegreen area.

Females lay eggs singly on the underside of host leaves. The worms generally fold leaves together to form a shelter in which they live on a silk lining. Young caterpillars mimic bird dropping. Older caterpillars are green with lovely blue spots. They also have ferocious eyespots, probably to deter predators. These worms usually feed on sweet bay, spicebush, and sassafras.

Although they have two pairs of ferocious eyespots, spicebush swallowtail caterpillars are harmless. Although spicebush butterflies are not rare, the caterpillars are seldom noticed.

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