I was testing my new camera at Oakes Quarry, and I was practicing on Cabbage White butterflies because not much else was flying. Imagine my surprise when I looked at the viewfinder and saw a Checkered White instead of a Cabbage White! It had looked just like the Cabbage Whites from a distance. 

This is a female Checkered White butterfly, photographed at Cox Arboretum in 2012. Females are more heavily marked than the males. 

Male Checkered White butterfly. This species is rare in our part of Ohio. I had a few sightings in September and October 2012, which was a good year for migratory butterflies. Then, I didn't see another Checkered White until I found this lone male on September 25, 2021.