Spicebush OR Black Swallowtail? An Underwing Guide
This may be redundant, but the question sometimes comes up: Spicebush or Black Swallowtail?
These two newly hatched individuals were seconds away from release and decided to pose for an educational poster.
Spicebush Swallowtail Papilio troilus
* Is usually large
* Has "blue comet" mark that pushes through the orange spots in the disc.
* Has small orange spot with no black eyespot at bottom of submargin.
Black Swallowtail Papilio polyxenes
* Is usually smallish
* Has complete row of orange spots in disc
* Has large orange spot with black eyespot at bottom of submargin.