Harms Woods Forest Preserve, Glenview, Cook County, Illinois, USA August 11, 2017
Just a few at the end of the season, but there must have been hundreds because there was hardly a leaf left on the prickly ash.
Looks like a Papilio cresphontes egg
Contributed by john and jane balaban on 7 March, 2018 - 9:45pm Last updated 7 March, 2018 - 11:27pm