Caterpillars
of Eastern Forests, publication online, file to download and ordering
information:
Butterfly Web Site
Butterflysite.com
Minnesota Nature Photography
Club
NABA - You can use the "Butterflies
I've Seen" link to report sightings and participate in the
Memorial Day count
Butterflies and Moths
of North America - Occurrence maps, species accounts, checklists,
and photographs
USGS
List of Butterflies in St. Louis County
