| Pterourus multicaudatus (W. F. Kirby, 1884) |
| Status: Uncommon to common resident |
| Flight Period(s): At least two flights. Adults have been found in Nebraska from 15 April – 10 September. |
| Range: The Two-tailed Swallowtail is found in the western half of the United States and southern Canada, south into Mexico. In Nebraska it has been found in the western half of the state, although it becomes increasingly scare eastward. |
| Larval Hostplant(s): Choke Cherry (Prunus virginiana) and Green Ash (Fraxinus pennsylvanica) are listed hostplants which are known to be used in the state. |
| Overwinter: As pupae. |
| Commentary/Habitat: The Two-tailed Swallowtail is most common in the rugged regions of the panhandle and ranges east into the loess hills of south central Nebraska. Larvae can often be found on roadside thickets of Choke Cherry in mid-late August. Adults have been observed nectaring on thistles. |
| Similar Species: Western Tiger Swallowtail, Eastern Tiger Swallowtail, and Canadian Tiger Swallowtail, the latter of which has not yet been found in the state but has been found in the Black Hills of South Dakota. |
