Illinois Butterfly Monitoring Network

Black Swallowtail

Black Swallowtail Black Swallowtail (Papilio polyxenes)
Two color phases of Black Swallowtail pupae were brought together in this one photo. One has transitioned to brown for overwintering (as everything turns brown in winter), but the green one has not changed yet.

Tom Poklen's yard in Roselle, Illinois
September 25, 2011

Photo by Tom Poklen

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