Howard County Bird Club
Juvenal’s Duskywing
Place name abbreviations: MPEA – Middle Patuxent Environment Area; PRSP – Patuxent River State Park; PVSP – Patapsco River Valley State Park.
Click on the common name to obtain additional information from the Butterflies and Moths of North America web page and the following common name for additional information from USGS web page. BugGuide is another web resource.
Legend:
| Common name [Link is to BAMONA] (wingspan range in inches) Common name [link is to USGS] |
Occurrence level & flight period. | |
| Habitat. | Typically visits (for nectaring). | Larval host plants. |
| Juvenal’s Duskywing (1.25–1.9″) [Juvenal’s Duskywing] |
Common: M-Apr to L-May | Woods trails & edges | Mud puddles | Red oaks, white oaks | |
Juvenal’s has a single brood in the spring and is not seen after the end of May.
Note the two spots on the underside of the hindwing near the edge in the third and fourth photos. This view is necessary during April and May in order to distinguish Juvenal’s Duskywing from the almost identical Horace’s Duskywing (which lacks these spots). The two species look similar when viewed from the top and cannot be distinguished from that angle.
The phenograms show the maximum number of individual butterflies of this species seen in the first eight years of the Howard County Butterfly Survey. From these graphs, one can see the number of broods of each species, when they are active, and the relative abundance of the species in each brood. The observed early and late dates are shown below The graphs can be used to anticipate the first sighting of a given species in the year and can help with identification.
Early: 4/2/2016 Late: 5/18/2014