Date of this Version
Seventy species of butterflies and skippers are reported from the Niobrara Valley Preserve. Twenty-four new county records are added to Brown County while 42 are added to the Keya Paha County checklist, bringing the total species/county to 63 and 67 respectively. Notes on numbers, flight periods, and habitat preferences are presented for each of the seventy species found on the Preserve. Twelve western and five eastern species reach their distributional limits in the Preserve area. Five hybrid butterflies involving three species of Basilarchia were captured on the Preserve.