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 457 - 480 of 2945 verified sightings
Observation date: May 27, 2020
Submitted by: stevecary
Region: Santa Fe County, New Mexico, United States
Verified by: stevecary
Verified date: Nov 03, 2020
Observation date: Jul 04, 2011
Submitted by: pkondrashov
Region: Adair County, Missouri, United States
Verified by: CA Ivy
Verified date: Oct 26, 2020
Observation date: Oct 10, 2020
Submitted by: eroutside
Region: Broward County, Florida, United States
Verified by: John Calhoun
Verified date: Oct 11, 2020
Observation date: Oct 03, 2020
Submitted by: jmgesell
Region: Northampton County, Pennsylvania, United States
Verified by: davidwright
Verified date: Oct 05, 2020
Observation date: Oct 03, 2020
Submitted by: nfergusson
Region: Pinellas County, Florida, United States
Verified by: John Calhoun
Verified date: Oct 04, 2020
Observation date: Aug 23, 2020
Submitted by: cobal2913
Region: Knox County, Ohio, United States
Verified by: rogerdowner
Verified date: Oct 04, 2020
Observation date: Sep 24, 2020
Submitted by: scvirginia
Region: Charleston County, South Carolina, United States
Verified by: Dennis Forsythe
Verified date: Oct 04, 2020
Observation date: Sep 14, 2020
Submitted by: Dennis Forsythe
Region: Charleston County, South Carolina, United States
Verified by: Dennis Forsythe
Verified date: Sep 17, 2020
Observation date: Sep 14, 2020
Submitted by: Dennis Forsythe
Region: Charleston County, South Carolina, United States
Verified by: Dennis Forsythe
Verified date: Sep 17, 2020
Observation date: Aug 15, 2020
Submitted by: Jeff Trahan
Region: Louisiana, United States
Verified by: CA Ivy
Verified date: Sep 16, 2020
Observation date: Sep 12, 2020
Submitted by: Debo Boddiford
Region: Candler County, Georgia, United States
Verified by: Mikelchap
Verified date: Sep 16, 2020
Observation date: Sep 12, 2020
Submitted by: Jeff Trahan
Region: Franklin Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Sep 15, 2020
Observation date: Sep 14, 2020
Submitted by: yardbird
Region: Bradford County, Pennsylvania, United States
Verified by: davidwright
Verified date: Sep 15, 2020
Observation date: Jul 31, 2011
Submitted by: cjbruchman
Region: Cook County, Illinois, United States
Verified by: rogerdowner
Verified date: Sep 14, 2020
Observation date: Aug 24, 2019
Submitted by: Jonathan Clark
Region: Rapides Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Sep 14, 2020
Observation date: Jul 18, 2020
Submitted by: Saxtonine
Region: Lebanon County, Pennsylvania, United States
Verified by: davidwright
Verified date: Sep 13, 2020
Observation date: Aug 02, 2020
Submitted by: Jgrugeon
Region: Chester County, Pennsylvania, United States
Verified by: davidwright
Verified date: Sep 13, 2020
Observation date: Sep 06, 2020
Submitted by: jthompson6112
Region: Beaufort County, South Carolina, United States
Verified by: Dennis Forsythe
Verified date: Sep 10, 2020
Observation date: Sep 06, 2020
Submitted by: kzmmrmn
Region: Northampton County, Pennsylvania, United States
Verified by: davidwright
Verified date: Sep 07, 2020
Observation date: Sep 06, 2020
Submitted by: kzmmrmn
Region: Northampton County, Pennsylvania, United States
Verified by: davidwright
Verified date: Sep 07, 2020
Observation date: Sep 05, 2020
Submitted by: djarrow
Region: York County, Pennsylvania, United States
Verified by: davidwright
Verified date: Sep 06, 2020
Observation date: Sep 01, 2020
Submitted by: Dennis Forsythe
Region: Charleston County, South Carolina, United States
Verified by: Dennis Forsythe
Verified date: Sep 04, 2020
Observation date: May 02, 2020
Submitted by: Jeff Trahan
Region: Franklin Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Sep 03, 2020
Observation date: May 07, 2020
Submitted by: Jeff Trahan
Region: Grant Parish, Louisiana, United States
Verified by: CA Ivy
Verified date: Sep 03, 2020
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