Attributes of Erynnis horatius

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.
Taxonomy Notes:

Images of Erynnis horatius

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Erynnis horatius - Erynnis_horatius.jpg

Erynnis horatius - Erynnis_horatius.jpg

The map below displays all BAMONA data for this species and has three different data layers:
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*The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. Sometimes, there are several records at the same location. Use the table view to access these records.

By default, the fifty most recently verified sightings are below. Sort by Observation Date to see the most recent sightings, or filter the sightings by region to get a regional list.

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Observation Date Submitter Region Verified Datesort icon
January 01, 1950 legacy.reporter Rio Arriba County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Colfax County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Union County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sandoval County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Santa Fe County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Miguel County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Quay County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Otero County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Lincoln County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Guadalupe County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Eddy County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Torrance County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mora County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Harding County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Union County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sussex County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Salem County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Somerset County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Passaic County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Middlesex County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Morris County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Ocean County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mercer County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Hudson County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Essex County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Gloucester County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Cumberland County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Cape May County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Burlington County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Camden County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Bergen County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Atlantic County, New Jersey, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Hillsborough County, New Hampshire, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sarpy County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sioux County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Lancaster County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Buffalo County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Jefferson County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Otoe County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter York County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Saunders County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Furnas County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Douglas County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Thurston County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Keya Paha County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Brown County, Nebraska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Tuscaloosa County, Alabama, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Shelby County, Alabama, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Madison County, Alabama, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mobile County, Alabama, United States December 31, 2004 Details