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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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
October 09, 2016 ezeemonee Ventura County, California, United States October 19, 2016 Details
September 29, 2016 ezeemonee Ventura County, California, United States September 29, 2016 Details
August 30, 2016 treichard San Diego County, California, United States September 15, 2016 Details
August 15, 2016 breck7348 San Joaquin County, California, United States August 16, 2016 Details
July 31, 2016 ezeemonee Ventura County, California, United States July 31, 2016 Details
July 28, 2016 sarabseth Alameda County, California, United States July 30, 2016 Details
July 17, 2016 PONYRCR Los Angeles County, California, United States July 19, 2016 Details
July 14, 2016 breck7348 San Joaquin County, California, United States July 17, 2016 Details
July 10, 2016 PONYRCR Los Angeles County, California, United States July 12, 2016 Details
June 05, 2016 ezeemonee Ventura County, California, United States June 06, 2016 Details
June 03, 2016 dabidaloca Kern County, California, United States June 04, 2016 Details
May 29, 2016 PONYRCR Los Angeles County, California, United States May 30, 2016 Details
May 29, 2016 PONYRCR Los Angeles County, California, United States May 30, 2016 Details
May 29, 2016 PONYRCR Los Angeles County, California, United States May 30, 2016 Details
May 27, 2016 ezeemonee Ventura County, California, United States May 28, 2016 Details
February 26, 2016 MAKI Ventura County, California, United States February 28, 2016 Details
February 19, 2016 David Allen Jones Orange County, California, United States February 25, 2016 Details
July 10, 2015 PONYRCR Los Angeles County, California, United States February 23, 2016 Details
April 22, 2015 grayhairstreak Brewster County, Texas, United States February 16, 2016 Details
September 24, 2015 pumblebumble Bexar County, Texas, United States February 02, 2016 Details
August 07, 2015 Josiah Gilbert San Luis Obispo County, California, United States December 30, 2015 Details
July 12, 2014 Josiah Gilbert San Luis Obispo County, California, United States December 25, 2015 Details
June 15, 2015 tjrickert Ventura County, California, United States November 16, 2015 Details
September 20, 2015 Selwyn Quan Santa Clara County, California, United States September 23, 2015 Details
September 01, 2015 Nancy Asquith Santa Clara County, California, United States September 02, 2015 Details
August 23, 2015 Nancy Hamlett Los Angeles County, California, United States August 27, 2015 Details
August 06, 2015 John Wilson Socorro County, New Mexico, United States August 23, 2015 Details
July 28, 2015 ezeemonee Ventura County, California, United States July 30, 2015 Details
July 27, 2015 LoveYourPetExpo Shasta County, California, United States July 28, 2015 Details
June 21, 2015 shakespearenut Los Angeles County, California, United States July 11, 2015 Details
June 28, 2015 Selwyn Quan Santa Clara County, California, United States July 02, 2015 Details
May 27, 2015 Sue Orlowski Sacramento County, California, United States July 01, 2015 Details
March 28, 2015 MAKI Ventura County, California, United States March 29, 2015 Details
March 18, 2015 Ralph S. Carlson Glenn County, California, United States March 23, 2015 Details
March 18, 2015 The_Battus_philenor Butte County, California, United States March 19, 2015 Details
January 25, 2015 MAKI Ventura County, California, United States February 05, 2015 Details
September 06, 2013 Nancy Hamlett Los Angeles County, California, United States January 22, 2015 Details
July 16, 2014 Redheart Canyonlands Bandera County, Texas, United States September 23, 2014 Details
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