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  • Horace's Duskywing - (Erynnis horatius)

    Horace's Duskywing - (Erynnis horatius)

    The brown color, similar spots and regional variations in shade make Horace's Duskywing easy to mistake for other Duskywings.

    Staff Writer (1/31/2017): 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.

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    Details of the:
    Horace's Duskywing

    Category: Butterfly or Moth
    Common name: Horace's Duskywing
    Scientific Name: Erynnis horatius

      Kingdom: Animalia
       Phylum: Arthropoda
        Class: Insecta
         Order: Lepidoptera
          Family: Hesperiidae
           Genus: Erynnis
            Species: horatius

    Size (Adult, Length): 36mm to 50mm (1.42in to 1.97in)

    Identifying Colors: brown, white, pink

    Additional Descriptors: flying, helpful

    North American Reach (Though Not Limited To*): Alabama; Arkansas; Colorado; Connecticut; Delaware; Florida; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Nebraska; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Virginia; West Virginia; Wisconsin; Wyoming; Mexico

    * Keep in mind that an insect's reach is not limited by lines on a map and therefore may appear in areas/regions/states beyond those listed above.

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