Pacuvius Duskywing
Erynnis pacuvius (Lintner, 1878)
Family: Hesperiidae
Subfamily: Pyrginae
Identification: Upperside brown to black; forewing with uneven dark bands and small submarginal spots. Hindwing fringes are white with brown scales at their bases in subspecies pacuvius (Utah, Colorado, Arizona, New Mexico) and brown in other subspecies. 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 3/8 inches (3.2 - 3.5 cm).
Life History: To wait for females, males perch on hilltops all day, and sometimes patrol when there is a high density of males.
Flight: Two broods in southern California, Arizona, and New Mexico; one brood in the north.
Caterpillar Hosts: Various wild lilacs including deer brier (Ceanothus fendleri), mountain whitethorn (Ceanothus cordulatus), hairy ceanothus (Ceanothus oliganthus), and others.
Adult Food: Nectar from flowers including Ceanothus.
Habitat: Open coniferous forest, chaparral, cutover land.
Range: British Columbia south through the mountains of western North America to southern California, Arizona, New Mexico, Baja California Norte, and south to Veracruz, Mexico.
Conservation: Not usually required.
NCGR: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Comments: NULL
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Verified Sightings
Displaying 1 - 24 of 369 verified sightings
Observation date: May 12, 2025
Submitted by: topper72
Region: Los Alamos County, New Mexico, United States
Verified by: stevecary
Verified date: May 16, 2025
Observation date: Mar 29, 2025
Submitted by: bonfrey
Region: Socorro County, New Mexico, United States
Verified by: stevecary
Verified date: Apr 14, 2025
Observation date: Jun 11, 2024
Submitted by: cklindsey
Region: Columbia County, Washington, United States
Verified by: davidwdroppers
Verified date: Sep 30, 2024
Observation date: May 08, 2024
Submitted by: Joshua C
Region: Cibola County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 23, 2024
Observation date: Jul 07, 2024
Submitted by: Paul Prappas
Region: Sierra County, California, United States
Verified by: Ken Davenport
Verified date: Jul 14, 2024
Observation date: Jul 01, 2024
Submitted by: hasfitz5
Region: Washoe County, Nevada, United States
Verified by: Ken Davenport
Verified date: Jul 10, 2024
Observation date: Jun 30, 2024
Submitted by: ezeemonee
Region: Kern County, California, United States
Verified by: Ken Davenport
Verified date: Jul 03, 2024
Observation date: Jun 30, 2024
Submitted by: Zencoyote
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jul 01, 2024
Observation date: May 27, 2024
Submitted by: MAKI
Region: Los Angeles County, California, United States
Verified by: Ken Davenport
Verified date: Jun 10, 2024
Observation date: Jun 08, 2024
Submitted by: Cactuswren1976
Region: Santa Fe County, New Mexico, United States
Verified by: stevecary
Verified date: Jun 10, 2024
Observation date: May 10, 2024
Submitted by: butterflies4us
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: May 11, 2024
Observation date: Apr 19, 2024
Submitted by: butterflies4us
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Apr 23, 2024
Observation date: May 18, 2004
Submitted by: natureali
Region: Kern County, California, United States
Verified by: Ken Davenport
Verified date: Mar 22, 2024
Observation date: Jun 17, 2023
Submitted by: stevecary
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Dec 03, 2023
Observation date: Jul 27, 2023
Submitted by: madamirie
Region: Shasta County, California, United States
Verified by: Ken Davenport
Verified date: Aug 28, 2023
Observation date: Jul 05, 2023
Submitted by: Marta Reece
Region: Sierra County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 06, 2023
Observation date: Jun 16, 2023
Submitted by: twofried
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Jun 22, 2023
Observation date: Jun 02, 2023
Submitted by: hiker96
Region: Klickitat County, Washington, United States
Verified by: davidwdroppers
Verified date: Jun 07, 2023
Observation date: May 28, 2023
Submitted by: cklindsey
Region: Walla Walla County, Washington, United States
Verified by: davidwdroppers
Verified date: May 31, 2023
Observation date: Jun 10, 2022
Submitted by: glennfine
Region: Siskiyou County, California, United States
Verified by: Ken Davenport
Verified date: May 11, 2023
Observation date: Apr 23, 2023
Submitted by: Marta Reece
Region: Hidalgo County, New Mexico, United States
Verified by: stevecary
Verified date: May 03, 2023
Observation date: Jun 09, 2022
Submitted by: gasigr
Region: Jefferson County, Oregon, United States
Verified by: Ken Davenport
Verified date: Feb 26, 2023
Observation date: Jul 09, 2022
Submitted by: hydapse
Region: Carbon County, Montana, United States
Verified by: J_Martineau
Verified date: Jan 09, 2023
Observation date: Jul 12, 2022
Submitted by: stevecary
Region: Otero County, New Mexico, United States
Verified by: stevecary
Verified date: Dec 31, 2022
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