I saw 1 Nymphalis antiopa along UAF's "Commuter Trail" - between the satellite towers and Potato Field.
Washington Monument State Park, Maryland
Witnessed today in my yard in Waretown NJ.
Nymphalis antiopa, known as the Mourning Cloak in North America and the Camberwell Beauty in Britain, is a large butterfly native to Eurasia and North America. See also Anglewing butterflies.