The Wood Nymph butterfly on the left was seen in Clay Pond Refuge, near Frewsburg, New York.
The Wood Nymph butterfly on the right was seen in Raccoon Creek State Park in Hookstown, Pennsylvania.
Frewsburg is a 3-hour drive north of Hookstown.
The stark difference in absence of yellow patch on the forewings and presence of large yellow patch on forewings fascinates me. Populations living some 200 miles apart, and Big differences in coloration/’eyes.’
I’ll long remember seeing the Wood Nymph butterflies of Raystown Lake in Central Pennsylvania. They had Huge patches of very bright yellow! When Barbara Ann (“OBM) introduced me to Clay Pond, and I met the yellow-less butterfly seen above, Wow! was I puzzled.
Dang! I wish I was a student again, so much to explore/study.