Juvenal's Duskywing
Erynnis juvenalis (Fabricius, 1793)
Family: Hesperiidae
Subfamily: Pyrginae
Identification: Upperside of male is brown with clear spots, indistinct dark markings, and scattered white hairs; female has larger markings and spots. Underside of hindwing has 2 round pale 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 1/4 - 1 15/16 inches (3.2 - 4.9 cm).
Life History: To wait for females, males perch in forest clearings or edges on bare twigs about 3-12 feet above the ground; they will often patrol from these perches. Females lay eggs singly on young leaves and seedlings of the host plants. Caterpillars feed on leaves and rest in nests of rolled or tied leaves; fully-grown caterpillars hibernate.
Flight: One brood from April-June, emerging as early as late January in peninsular Florida.
Caterpillar Hosts: Tree and shrub oaks (Quercus species).
Adult Food: Nectar from flowers of winter cress, dandelion, wild plum, wisteria, blueberry, Carolina vetch, redbud, and lilac.
Habitat: Oak woods or scrub and associated edges or fields.
Range: Nova Scotia and central New England west through southern Manitoba to the Dakotas and northeastern Wyoming; south through most of the eastern United States to Florida, the Gulf states, and Texas. White-fringed populations occur in west Texas, New Mexico, and central Arizona south to central 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 1 - 24 of 4336 verified sightings
Observation date: May 07, 2025
Submitted by: Daniel Morton
Region: Somerset County, New Jersey, United States
Verified by: jwileyrains
Verified date: Jul 09, 2025
Observation date: May 19, 2025
Submitted by: Daniel Morton
Region: Somerset County, New Jersey, United States
Verified by: jwileyrains
Verified date: Jul 09, 2025
Observation date: Apr 04, 2025
Submitted by: Team-Chick
Region: Virginia, York County, United States
Verified by: jmgesell
Verified date: Jul 07, 2025
Observation date: Apr 04, 2020
Submitted by: Bookworm86
Region: Amherst County, Virginia, United States
Verified by: jmgesell
Verified date: Jul 07, 2025
Observation date: Mar 25, 2024
Submitted by: beverlynantz
Region: Harlan County, Kentucky, United States
Verified by: CA Ivy
Verified date: Jun 27, 2025
Observation date: Jun 23, 2025
Submitted by: John Terpstra
Region: Ontario, Canada
Verified by: jmgesell
Verified date: Jun 27, 2025
Observation date: Jun 16, 2025
Submitted by: dnight30
Region: Carroll County, New Hampshire, United States
Verified by: John Calhoun
Verified date: Jun 17, 2025
Observation date: May 04, 2025
Submitted by: Steven Wilson
Region: Nicholas County, West Virginia, United States
Verified by: curtis.lehman
Verified date: Jun 13, 2025
Observation date: Jun 05, 2025
Submitted by: Tom Dudones
Region: Franklin County, New York, United States
Verified by: jmgesell
Verified date: Jun 05, 2025
Observation date: Jun 05, 2025
Submitted by: Tom Dudones
Region: Franklin County, New York, United States
Verified by: jmgesell
Verified date: Jun 05, 2025
Observation date: Jun 05, 2025
Submitted by: Tom Dudones
Region: Franklin County, New York, United States
Verified by: jmgesell
Verified date: Jun 05, 2025
Observation date: Jun 02, 2025
Submitted by: John Terpstra
Region: Ontario, Canada
Verified by: jmgesell
Verified date: Jun 05, 2025
Observation date: Jun 03, 2025
Submitted by: John Terpstra
Region: Ontario, Canada
Verified by: jmgesell
Verified date: Jun 05, 2025
Observation date: Jun 03, 2025
Submitted by: BeaLaporte
Region: Ontario, Canada
Verified by: jmgesell
Verified date: Jun 05, 2025
Observation date: May 26, 2025
Submitted by: Eric Hartshaw
Region: Lycoming County, Pennsylvania, United States
Verified by: davidwright
Verified date: May 29, 2025
Observation date: May 23, 2025
Submitted by: drmarc60223
Region: Dunn County, Wisconsin, United States
Verified by: jmgesell
Verified date: May 27, 2025
Observation date: May 17, 2025
Submitted by: Sometimes
Region: Ontario, Canada
Verified by: jmgesell
Verified date: May 17, 2025
Observation date: May 16, 2025
Submitted by: Sometimes
Region: Ontario, Canada
Verified by: jmgesell
Verified date: May 16, 2025
Observation date: Apr 23, 2025
Submitted by: tiki33wv
Region: Athens County, Ohio, United States
Verified by: rogerdowner
Verified date: May 03, 2025
Observation date: May 01, 2025
Submitted by: jmgesell
Region: Monroe County, Pennsylvania, United States
Verified by: davidwright
Verified date: May 02, 2025
Observation date: Apr 29, 2025
Submitted by: gjkoppel
Region: Butler County, Pennsylvania, United States
Verified by: davidwright
Verified date: Apr 29, 2025
Observation date: Apr 22, 2025
Submitted by: Benjamin Miller
Region: Knox County, Ohio, United States
Verified by: rogerdowner
Verified date: Apr 26, 2025
Observation date: Jun 11, 2016
Submitted by: Christine Stanke
Region: Portage County, Wisconsin, United States
Verified by: jmgesell
Verified date: Apr 26, 2025
Observation date: Jun 22, 2014
Submitted by: David M. Gascoigne
Region: Ontario, Canada
Verified by: jmgesell
Verified date: Apr 25, 2025
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