State animal of Pennsylvania

The firefly (commonly called "lightning bug") is Pennsylvania's state insect, as of April 10, 1974. As of December 5, 1988, the species "Photuris pennsylvanica, De Geer" is the official state insect.

Sources: www.pa.gov > About Pennsylvania

http://www.legis.state.pa.us/WU01/VC/visitor_info/quiz2/insect.htm