Black Swallowtail (Papilio polyxenes)
Two color forms of Black Swallowtail pupae were brought together in this one photo.
Tom Poklen’s yard in Roselle, Illinois
September 25, 2011
Photo by Tom Poklen
Illinois Butterfly Monitoring Network
The Illinois Butterfly Monitoring Network engages citizen scientists in the process of collecting quantitative data on butterfly populations.
Black Swallowtail (Papilio polyxenes)
Two color forms of Black Swallowtail pupae were brought together in this one photo.
Tom Poklen’s yard in Roselle, Illinois
September 25, 2011
Photo by Tom Poklen