How many butterflies live in Philadelphia? Ten species? Twenty? How about 115! Generate a list for where you live by using the regional checklist feature on http://www.butterfliesandmoths.org/. Why not go butterfly watching in the big city?
The species accounts on http://www.butterfliesandmoths.org/, give nectar and larval host plants that you can plant to attract local butterflies to your garden. The North American Butterfly Association (http://www.naba.org/) has journals, plant lists for butterfly gardening and citizen science projects related to butterflies.
The following list is of the 115 confirmed sightings of butterflies in Philadelphia by the kind folks at Montana State University’s Butterflies and Moths of North America website. This list is not someone’s best guess, but actual identifications by experts in the county of Philadelphia (the whole city).
All the species names are linked to the profile on the Butterflies and Moths website.