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
September 01, 2014 Joy27 Los Angeles County, California, United States September 03, 2014 Details
June 26, 2014 wapperdude Los Angeles County, California, United States June 27, 2014 Details
May 21, 2014 Raul Delgado Texas, United States, Webb County June 05, 2014 Details
August 17, 2013 Ralph S. Carlson Los Angeles County, California, United States August 27, 2013 Details
August 17, 2013 Ralph S. Carlson Los Angeles County, California, United States August 27, 2013 Details
June 22, 2013 Jamie Chavez Santa Barbara County, California, United States June 24, 2013 Details
August 06, 2012 Josiah Gilbert San Luis Obispo County, California, United States December 09, 2012 Details
July 31, 1986 legacy.reporter (Ray Stanford) Cochise County, Arizona, United States December 01, 2012 Details
July 31, 1986 legacy.reporter (Ray Stanford) Cochise County, Arizona, United States December 01, 2012 Details
June 24, 1988 charlie covell (Charles Covell) Cochise County, Arizona, United States December 01, 2012 Details
July 12, 1997 legacy.reporter (Kilian Roever) Apache County, Arizona, United States December 01, 2012 Details
July 22, 1997 legacy.reporter (R. Stanford & A. Warren) Apache County, Arizona, United States December 01, 2012 Details
September 10, 2012 JimConrad Texas, United States, Uvalde County September 12, 2012 Details
September 02, 2012 docdemory Orange County, California, United States September 06, 2012 Details
August 26, 2012 tmorgan Orange County, California, United States August 26, 2012 Details
June 20, 2008 mojoedevine Alameda County, California, United States August 23, 2012 Details
July 07, 2012 dspicer Cochise County, Arizona, United States July 29, 2012 Details
July 02, 2012 evilrobot42 Santa Clara County, California, United States July 15, 2012 Details
April 18, 2012 mudgrub12 Placer County, California, United States April 20, 2012 Details
August 17, 2010 Josiah Gilbert San Luis Obispo County, California, United States February 16, 2012 Details
July 07, 1976 legacy.reporter (Clifford D. Ferris) Cochise County, Arizona, United States January 01, 2012 Details
July 07, 1976 legacy.reporter (Clifford D. Ferris) Cochise County, Arizona, United States January 01, 2012 Details
July 07, 1976 legacy.reporter (Clifford D. Ferris) Cochise County, Arizona, United States January 01, 2012 Details
October 14, 2011 jeanie.in.south.texas Hidalgo County, Texas, United States October 21, 2011 Details
October 15, 2011 GarPhotog San Diego County, California, United States October 17, 2011 Details
October 06, 2011 AKimages San Diego County, California, United States October 08, 2011 Details
April 23, 2011 Ken Davenport (Ken Davenport) Fresno County, California, United States May 01, 2011 Details
April 25, 1982 Ken Davenport (Ken Davenport) Pima County, Arizona, United States January 01, 2011 Details
April 28, 1982 Ken Davenport (Ken Davenport) Pima County, Arizona, United States January 01, 2011 Details
July 28, 2005 Ken Davenport (Ken Davenport) Cochise County, Arizona, United States January 01, 2011 Details
July 03, 2007 Ken Davenport (Ken Davenport) Cochise County, Arizona, United States January 01, 2011 Details
July 02, 2007 Ken Davenport (Ken Davenport) Cochise County, Arizona, United States January 01, 2011 Details
July 01, 2007 Ken Davenport (Ken Davenport) Cochise County, Arizona, United States January 01, 2011 Details
July 02, 2007 Ken Davenport (Ken Davenport) Cochise County, Arizona, United States January 01, 2011 Details
August 07, 1994 Ken Davenport (Ken Davenport) Pima County, Arizona, United States January 01, 2011 Details
February 21, 2012 legacy.reporter (Frank Model) Orange County, California, United States January 01, 2011 Details
April 11, 2010 Ken Davenport (Ken Davenport) Kern County, California, United States December 31, 2010 Details
April 03, 2010 legacy.reporter (Mark Walker) Riverside County, California, United States December 31, 2010 Details
April 03, 2010 legacy.reporter (Mark Walker) Riverside County, California, United States December 31, 2010 Details
April 11, 2010 Ken Davenport (Ken Davenport) Kern County, California, United States December 31, 2010 Details
April 03, 2010 legacy.reporter (Mark Walker) Riverside County, California, United States December 31, 2010 Details
April 11, 2010 Ken Davenport (Ken Davenport) Kern County, California, United States December 31, 2010 Details
July 06, 2007 legacy.reporter (Koji Shiraiwa) San Diego County, California, United States December 31, 2010 Details
May 02, 2004 legacy.reporter (William Bouton) San Luis Obispo County, California, United States December 31, 2010 Details
September 27, 2003 legacy.reporter (William Bouton) San Luis Obispo County, California, United States December 31, 2010 Details
August 25, 2005 legacy.reporter (Kim Davis & Mike Stangeland) San Luis Obispo County, California, United States December 31, 2010 Details
June 18, 1989 legacy.reporter (A. M. Shapiro) Nevada County, California, United States August 02, 2010 Details
October 04, 1986 legacy.reporter (Robert L. Langston) Monterey County, California, United States April 02, 2010 Details
March 22, 1967 legacy.reporter (Larry Orsak) Orange County, California, United States January 06, 2010 Details
March 19, 1970 legacy.reporter (Gary Felton) Orange County, California, United States January 06, 2010 Details