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 337 - 360 of 2939 verified sightings
Observation date: Jul 23, 2021
Submitted by: gjkoppel
Region: Butler County, Pennsylvania, United States
Verified by: davidwright
Verified date: Jul 26, 2021
Observation date: Jul 24, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: Jul 25, 2021
Observation date: Jul 24, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: Jul 25, 2021
Observation date: Jul 25, 2021
Submitted by: sgensits
Region: Leon County, Florida, United States
Verified by: John Calhoun
Verified date: Jul 25, 2021
Observation date: Jul 07, 2021
Submitted by: DeepSkyKelly
Region: Las Animas County, Colorado, United States
Verified by: mikefisher
Verified date: Jul 25, 2021
Observation date: Jul 17, 2021
Submitted by: John Demko
Region: Georgia, Washington County, United States
Verified by: Mikelchap
Verified date: Jul 24, 2021
Observation date: Jul 23, 2021
Submitted by: jmgesell
Region: Northampton County, Pennsylvania, United States
Verified by: davidwright
Verified date: Jul 24, 2021
Observation date: Jul 07, 2021
Submitted by: yardbird
Region: Cumberland County, Pennsylvania, United States
Verified by: davidwright
Verified date: Jul 22, 2021
Observation date: May 06, 2021
Submitted by: Paula_Alaine
Region: Alleghany County, North Carolina, United States
Verified by: Dennis Forsythe
Verified date: Jul 22, 2021
Observation date: Jul 12, 2021
Submitted by: joeschelling
Region: Sandoval County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 16, 2021
Observation date: Jul 10, 2021
Submitted by: Jeff Trahan
Region: St. Landry Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Jul 14, 2021
Observation date: Jul 10, 2021
Submitted by: Jeff Trahan
Region: St. Landry Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Jul 14, 2021
Observation date: Jun 16, 2021
Submitted by: Jeff Trahan
Region: Natchitoches Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Jul 14, 2021
Observation date: Jul 08, 2021
Submitted by: Jeff Trahan
Region: Caddo Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Jul 14, 2021
Observation date: Jun 25, 2021
Submitted by: allisonp28
Region: Brunswick County, North Carolina, United States
Verified by: Dennis Forsythe
Verified date: Jul 14, 2021
Observation date: Jul 11, 2021
Submitted by: michellelynn1982
Region: Orange County, Florida, United States
Verified by: John Calhoun
Verified date: Jul 11, 2021
Observation date: Jul 09, 2021
Submitted by: twofried
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 11, 2021
Observation date: Jul 04, 2021
Submitted by: CJCole
Region: Seminole County, Florida, United States
Verified by: John Calhoun
Verified date: Jul 10, 2021
Observation date: Jul 06, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: Jul 10, 2021
Observation date: Jul 06, 2021
Submitted by: yardbird
Region: York County, Pennsylvania, United States
Verified by: davidwright
Verified date: Jul 07, 2021
Observation date: Sep 01, 2019
Submitted by: systanfield
Region: Richland County, South Carolina, United States
Verified by: Dennis Forsythe
Verified date: Jul 07, 2021
Observation date: Jul 01, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: Jul 01, 2021
Observation date: Jun 27, 2021
Submitted by: LauraSea
Region: Nassau County, Florida, United States
Verified by: John Calhoun
Verified date: Jun 28, 2021
Observation date: Jun 24, 2021
Submitted by: tirvine2020
Region: Alachua County, Florida, United States
Verified by: John Calhoun
Verified date: Jun 26, 2021
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