Discover fascinating caterpillar facts you should know. Eastern, western and Canadian tiger swallowtail butterflies look almost identical, but the latter two are smaller. Use geography to tell ...

In the east, look for the Eastern tiger swallowtail, Canadian tiger swallowtail, and Appalachian tiger swallowtail. Out west, you’ll find the Western tiger swallowtail and the pale swallowtail.