Horace's Duskywing (Erynnis horatius)
Detailing the physical features, habits, territorial reach and other identifying qualities of the Horace's Duskywing.
Updated: 1/31/2017; Authored By Staff Writer; Content ©www.InsectIdentification.org
The brown color, similar spots and regional variations in shade make Horace's Duskywing easy to mistake for other Duskywings.
Fast in flight, Horace's Duskywing is a difficult butterfly to identify quickly. Careful examination of wing pattern, color and season of activity are needed to differentiate it from Juvenal's Duskywing. Even then, it can be complicated. For example, Horace's Duskywing does not have two white spots on its hindwings, but usually Juvenal's do (though some individuals don't).
Males sit on plants that are low to the ground and scout for females. Mating typically happens at mid-day. Females lay fertilized eggs on young branches of oak trees.
Caterpillars feed on the leaves of a variety of oak tree species. In warmer areas, two generations are produced with late-season caterpillars overwintering
Adults visit flowers from goldenrod, peppermint, dogbane and winter cress. They enjoy sunbathing in open areas. Look for them in oak forests, open fields, roadsides, meadows and gardens in the summer.