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Project Noah Nature School
Papilio troilus
Nice find! The markings on the underside of the wings are very similar between the Spicebush and Black Swallowtails. The Spicebush Swallowtail is missing one medial orange marking (that area is visible on your images).
Here are images you can compare to see the differences:
Spicebush Swallowtail: http://bugguide.net/node/view/558725
Black Swallowtail: http://bugguide.net/node/view/30995
Spotted on Jul 25, 2013
Submitted on Jul 26, 2013
+1
