I found three or four that were likely Dukes' Skippers. They look much like Dion but the ray on the underside is more pronounced and the upperside is rather dark. I only saw the underwing of today's individuals.
Reid is a remarkable place for a variety of butterflies since it was back in 2008 I discovered the colony of Southern (Northern Oak) Hairstreaks. (I also found another satellite colony some distance away!). Dukes' Skippers were found there too (a new Lambton Co. location). I have recorded about 53 species of butterflies on the property, and most of these are within a small area of it!
Gray Comma (fairly abundant around here) today
As we know, butterflies have been scarce this year. Hairstreaks in this area are very much so. Reid usually has a high percentage of hairstreaks due to the dominance of oaks and other foodplants suitable for them. Back in 2008 it was a banner year for hairstreaks as clusters of them covered milkweed flowers. Milkweed is very abundant this year but try to find a hairstreak!
(not a Reid hairstreak!)