The Spicebush Swallowtail has an overall greenish tint to its wings. It also has the elongated 'tails' at the tips of the hindwings like all Swallowtails. Females have a band of blue along the base of the hindwings that is visible when the wings are open (flat). Males have a band of greenish-white instead of blue.
It is most commonly seen in the warmer states of the southern U.S., but its range ventures as far north as southern Ontario. It is associated with the spicebush plant, a shrub with a spicy-lemony type of scent that is best appreciated by crushing a few leaves in your hand. Males are often seen drinking water from puddles formed by wet mud.
Caterpillars feed on spicebush, sassafras and bay plants. The green caterpillar has a humpback with a large black and yellow eyespot on its sides. It is a tidy little creature, wrapping a leaf around itself for a shelter, pushing it own feces out of it to keep it clean.