Horace's Duskywing
Erynnis horatius (Scudder & Burgess, 1870)
Family: Hesperiidae
Subfamily: Pyrginae
Identification: Fringes are brown. Upperside of male forewing is dark brown with little contrast and no white overscaling. Upperside of female forewing is light brown with a contrasting pattern and large transparent spots. Underside of hindwing is usually without 2 spots below the apex. Male has a costal fold containing yellow scent scales; female has a patch of scent scales on the 7th abdominal segment.
Wing Span: 1 7/16 - 1 15/16 inches (3.6 - 4.9 cm).
Life History: To seek females, males perch at the ends of twigs on hilltops or slopes about 1 foot above the ground. Mating has been observed around midday; females deposit eggs singly on new growth of the host. Caterpillars feed on young leaves and rest in leaf nests. Caterpillars of the last brood hibernate.
Flight: Two broods in the north from April-September, three broods in the Deep South and Texas from January-November.
Caterpillar Hosts: Both red and white oaks including willow oak (Quercus phellos), northern red oak (Q. velutina), scrub oak (Q. ilicifolia), water oak (Q. nigra), post oak (Q. stellata), and live oak (Q. virginiana).
Adult Food: Horace\'s Duskywing visits flower up to about 4.5 feet tall including dogbane, buttonbush, sneezeweed, goldenrod, peppermint, boneset, and winter cress.
Habitat: Open woodlands and edges, clearings, fencerows, wooded swamps, power-line right-of-ways, open fields, roadsides.
Range: Massachusetts west to eastern South Dakota; south through most of the eastern United States to Florida, the Gulf Coast, and South Texas; south in the west through southeastern Utah, Colorado, northeastern Arizona, and New Mexico.
Conservation: Not usually required.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
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Verified Sightings
Displaying 361 - 384 of 2939 verified sightings
Observation date: Jun 23, 2021
Submitted by: Mayaich17
Region: Faulkner County, Arkansas, United States
Verified by: CA Ivy
Verified date: Jun 24, 2021
Observation date: Jun 07, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: Jun 09, 2021
Observation date: May 22, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: May 29, 2021
Observation date: May 15, 2021
Submitted by: Michael Weisensee
Region: Sarasota County, Florida, United States
Verified by: John Calhoun
Verified date: May 20, 2021
Observation date: May 17, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: May 20, 2021
Observation date: May 19, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: May 20, 2021
Observation date: May 01, 2021
Submitted by: drmarc60223
Region: Columbia County, Pennsylvania, United States
Verified by: davidwright
Verified date: May 12, 2021
Observation date: May 06, 2021
Submitted by: H Hooper
Region: Leon County, Florida, United States
Verified by: John Calhoun
Verified date: May 10, 2021
Observation date: May 09, 2021
Submitted by: H Hooper
Region: Leon County, Florida, United States
Verified by: John Calhoun
Verified date: May 10, 2021
Observation date: May 08, 2021
Submitted by: sgensits
Region: Leon County, Florida, United States
Verified by: John Calhoun
Verified date: May 09, 2021
Observation date: May 04, 2021
Submitted by: jmgesell
Region: Northampton County, Pennsylvania, United States
Verified by: davidwright
Verified date: May 05, 2021
Observation date: Apr 12, 2021
Submitted by: otusasiotours
Region: Madison County, North Carolina, United States
Verified by: Dennis Forsythe
Verified date: May 05, 2021
Observation date: May 01, 2021
Submitted by: Birdwatcher5
Region: Volusia County, Florida, United States
Verified by: John Calhoun
Verified date: May 03, 2021
Observation date: May 01, 2021
Submitted by: woody meristem
Region: Lycoming County, Pennsylvania, United States
Verified by: davidwright
Verified date: May 02, 2021
Observation date: Apr 30, 2021
Submitted by: JoyceSw
Region: Marion County, Florida, United States
Verified by: John Calhoun
Verified date: May 01, 2021
Observation date: Apr 22, 2021
Submitted by: Bill Uttenweiler
Region: Orange County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Apr 23, 2021
Submitted by: Michael Weisensee
Region: Sarasota County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Apr 23, 2021
Submitted by: Michael Weisensee
Region: Sarasota County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Apr 20, 2021
Submitted by: fooangel
Region: Miami-Dade County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Apr 22, 2021
Submitted by: D Grimes
Region: Hernando County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Apr 24, 2021
Submitted by: dnunz
Region: Orange County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Apr 25, 2021
Submitted by: Bill Uttenweiler
Region: Brevard County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Apr 26, 2021
Submitted by: KShell
Region: Dixie County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
Observation date: Jul 21, 2013
Submitted by: DVL
Region: Collier County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 28, 2021
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