Attributes of Erynnis tristis

Mournful Duskywing
Erynnis tristis (Boisduval, 1852)

Family: Hesperiidae
Subfamily: Pyrginae
Identification: Male has a costal fold containing yellow scent scales; female has a patch of scent scales on the 7th abdominal segment. Upperside of wings is dark brown-black with some transparent spots. Spots are larger in the female. Underside of hindwing is dark brown with a row of long white spots near the margin.
Wing Span: 1 1/4 - 1 15/16 inches (3.2 - 4.9 cm).
Life History: Males perch on hilltops all day to watch for females. Eggs are laid singly on new growth of the host plant. Caterpillars feed on young leaves and rest in shelters of rolled or tied leaves. Caterpillars of the last brood hibernate.
Flight: Three broods in Texas from March-April, June-July, and September-November.
Caterpillar Hosts: Various oaks including coast live oak (Quercus agrifolia), blue oak (Q. douglasii), and valley oak (Q. lobata).
Adult Food: Flower nectar.
Habitat: Oak woodlands.
Range: Northern California south through central Arizona, southern New Mexico, the mountains of Mexico, and Central America to Colombia. Strays to South Texas.
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.
Taxonomy Notes:

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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 Hidalgo County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Grant 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 Catron County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Socorro County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sierra County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Luna County, New Mexico, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Dona Ana 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 Chaves 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 Coconino County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mohave County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Gila County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Greenlee County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Graham County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Pinal County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Pima County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Santa Cruz County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Cochise County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Apache County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Maricopa County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Yuma County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Tehama County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mendocino County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Lake County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Glenn County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Joaquin County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Colusa County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sutter County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Yuba County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Nevada County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sierra County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sonoma County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Napa County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Yolo County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sacramento County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter El Dorado County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Placer County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Marin County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Contra Costa County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Joaquin County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Solano County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sacramento County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Amador County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Francisco County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Calaveras County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Alameda County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Mateo County, California, United States December 31, 2004 Details