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 265 - 288 of 2939 verified sightings
Observation date: Mar 29, 2007
Submitted by: rdhealy1951@aol.com
Region: Hart County, Kentucky, United States
Verified by: James Steen
Verified date: Jun 16, 2022
Observation date: Apr 10, 2022
Submitted by: Jay Brasher
Region: Lincoln County, Tennessee, United States
Verified by: James Steen
Verified date: Jun 14, 2022
Observation date: Mar 30, 2022
Submitted by: Jay Brasher
Region: Lincoln County, Tennessee, United States
Verified by: James Steen
Verified date: Jun 14, 2022
Observation date: May 31, 2022
Submitted by: egilley
Region: Duval County, Florida, United States
Verified by: John Calhoun
Verified date: Jun 03, 2022
Observation date: May 12, 2022
Submitted by: Eric Hartshaw
Region: Lycoming County, Pennsylvania, United States
Verified by: James Steen
Verified date: May 30, 2022
Observation date: May 23, 2022
Submitted by: Eric Hartshaw
Region: Lycoming County, Pennsylvania, United States
Verified by: davidwright
Verified date: May 24, 2022
Observation date: Feb 02, 2018
Submitted by: Brian Ahern
Region: Hillsborough County, Florida, United States
Verified by: John Calhoun
Verified date: May 18, 2022
Observation date: Apr 22, 2022
Submitted by: Ed Rothwell
Region: Crittenden County, Arkansas, United States
Verified by: CA Ivy
Verified date: May 07, 2022
Observation date: May 01, 2022
Submitted by: topper72
Region: Los Alamos County, New Mexico, United States
Verified by: stevecary
Verified date: May 07, 2022
Observation date: Apr 19, 2022
Submitted by: Mapper
Region: Johnson County, Illinois, United States
Verified by: rogerdowner
Verified date: Apr 21, 2022
Observation date: Apr 18, 2022
Submitted by: Ron Stauber
Region: Palm Beach County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 19, 2022
Observation date: Apr 17, 2022
Submitted by: DeepSkyKelly
Region: Union County, New Mexico, United States
Verified by: stevecary
Verified date: Apr 18, 2022
Observation date: Apr 07, 2022
Submitted by: Bill Uttenweiler
Region: Brevard County, Florida, United States
Verified by: John Calhoun
Verified date: Apr 09, 2022
Observation date: Mar 14, 2022
Submitted by: Dennis Forsythe
Region: Charleston County, South Carolina, United States
Verified by: Dennis Forsythe
Verified date: Mar 15, 2022
Observation date: Aug 07, 2020
Submitted by: lantana
Region: Suffolk County, New York, United States
Verified by: jmgesell
Verified date: Mar 12, 2022
Observation date: Jul 28, 2020
Submitted by: AV-Photo1
Region: Suffolk County, New York, United States
Verified by: jmgesell
Verified date: Mar 12, 2022
Observation date: Sep 03, 2019
Submitted by: Mag-Pie
Region: Nassau County, New York, United States
Verified by: jmgesell
Verified date: Mar 09, 2022
Observation date: Sep 03, 2019
Submitted by: Mag-Pie
Region: Nassau County, New York, United States
Verified by: jmgesell
Verified date: Mar 09, 2022
Observation date: Sep 03, 2019
Submitted by: Mag-Pie
Region: Nassau County, New York, United States
Verified by: jmgesell
Verified date: Mar 01, 2022
Observation date: Aug 09, 2020
Submitted by: Cindy Kindle
Region: Hamilton County, New York, United States
Verified by: jmgesell
Verified date: Mar 01, 2022
Observation date: Jul 18, 2021
Submitted by: Cookiebun
Region: Suffolk County, New York, United States
Verified by: jmgesell
Verified date: Mar 01, 2022
Observation date: May 01, 2021
Submitted by: joanfiller
Region: Ulster County, New York, United States
Verified by: jmgesell
Verified date: Mar 01, 2022
Observation date: Jul 29, 2013
Submitted by: crx2aj3
Region: Albany County, New York, United States
Verified by: jmgesell
Verified date: Feb 28, 2022
Observation date: Feb 22, 2022
Submitted by: Joceb2005
Region: Collier County, Florida, United States
Verified by: John Calhoun
Verified date: Feb 26, 2022
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