Attributes of Cupido amyntula

Western Tailed-Blue
Cupido amyntula (Boisduval, 1852)

Family: Lycaenidae
Subfamily: Polyommatinae
Identification: Narrow tail on hindwing. Upperside of male blue, female brown with blue at wing base. Underside white with black spots indistinct or lacking; single small orange spot near tail.
Wing Span: 7/8 - 1 1/8 inches (2.2 - 2.9 cm).
Life History: Males patrol and perch during the day. Females lay eggs on flowers or young seedpods of host plant. Caterpillars eat young seeds inside the pod, where they overwinter and pupate.
Flight: March-July. Several broods in southern California, a partial second brood in the southern Rocky Mountains, and one brood elsewhere.
Caterpillar Hosts: Legumes with inflated pods including false lupine (Thermopsis), milkvetch (Astragalus), crazyweed (Oxytropis), and vetches (Vicia and Lathyrus).
Adult Food: Flower nectar.
Habitat: Open - usually native - areas with low shrubs including chaparral, meadows, and open woodland.
Range: Alaska south through western North America and all western mountains to northern Baja California, east across Canada's prairie provinces to northern Michigan, Ontario, and the Gaspé Peninsula.
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.
Taxonomy Notes:

Images of Cupido amyntula

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Cupido amyntula - everes_amyntula_egg_raisingbutterflies.jpg

Cupido amyntula - everes_amyntula_egg_raisingbutterflies.jpg
Cupido amyntula - everes_amyntula_caterpillar2_raisingbutterflies.jpg

Cupido amyntula - everes_amyntula_caterpillar2_raisingbutterflies.jpg
Cupido amyntula - everes_amyntula_caterpillar3_raisingbutterflies.jpg

Cupido amyntula - everes_amyntula_caterpillar3_raisingbutterflies.jpg
Cupido amyntula - Everes_amyntulaSanders2.jpg

Cupido amyntula - Everes_amyntulaSanders2.jpg
Cupido amyntula - Everes_amyntulaSanders.jpg

Cupido amyntula - Everes_amyntulaSanders.jpg


The map below displays all BAMONA data for this species and has three different data layers:
1. All records (yellow dots)   2. Recently verified records (orange dots)*   3. US county records (purple)

There are also three base layers: 1. Satellite    2. Normal   3. Hybrid

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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
July 06, 2014 janazak Yukon Territory, Canada July 14, 2014 Details
June 25, 2014 Samsara Chapman Lewis And Clark County, Montana, United States July 01, 2014 Details
June 25, 2014 janazak Yukon Territory, Canada June 29, 2014 Details
March 27, 2014 corypoole Shasta County, California, United States March 28, 2014 Details
June 16, 2013 J_Martineau Big Horn County, Wyoming, United States December 13, 2013 Details
May 19, 2012 Robert Gorman San Diego County, California, United States November 09, 2013 Details
April 18, 2013 Robert Gorman Orange County, California, United States October 28, 2013 Details
June 23, 2010 mbalame99 Clatsop County, Oregon, United States October 10, 2013 Details
May 19, 2012 plex1ppus Pend Oreille County, Washington, United States April 05, 2013 Details
May 20, 2012 Ethan Hall Cache County, Utah, United States December 20, 2012 Details
July 09, 1982 legacy.reporter (K Hansen-S. Mattoon) Lander County, Nevada, United States December 01, 2012 Details
June 28, 1987 legacy.reporter (George T. Austin) Humboldt County, Nevada, United States December 01, 2012 Details
June 20, 1990 legacy.reporter (David Eiler) Elko County, Nevada, United States December 01, 2012 Details
May 25, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 05, 1979 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 13, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 22, 1968 legacy.reporter (Anna Austin) Clark County, Nevada, United States December 01, 2012 Details
May 31, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 08, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 17, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 13, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
July 28, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 17, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
July 29, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States December 01, 2012 Details
June 30, 2012 jmj2012 Iowa County, Wisconsin, United States August 14, 2012 Details
August 04, 2012 Janet Tubb Ontario, Canada August 05, 2012 Details
June 16, 2012 plex1ppus Mineral County, Montana, United States July 25, 2012 Details
June 20, 2009 hjbarkey9 Routt County, Colorado, United States July 21, 2012 Details
May 23, 2012 Josiah Gilbert San Luis Obispo County, California, United States June 22, 2012 Details
June 16, 2012 PDunwiddie Kittitas County, Washington, United States June 18, 2012 Details
May 27, 2012 PDunwiddie Yakima County, Washington, United States June 04, 2012 Details
May 11, 2012 AKimages San Diego County, California, United States May 13, 2012 Details
April 08, 2012 mudgrub12 Placer County, California, United States April 11, 2012 Details
June 21, 2011 coreyk Clark County, Nevada, United States February 12, 2012 Details
April 28, 2011 coreyk Clark County, Nevada, United States February 06, 2012 Details
June 08, 2008 pcastrovillo Boise County, Idaho, United States February 06, 2012 Details
June 26, 2012 Ken Davenport (Ken Davenport) Mono County, California, United States January 01, 2012 Details
June 09, 1977 legacy.reporter (Richard Bailowitz) Santa Cruz County, Arizona, United States January 01, 2012 Details
July 11, 2011 legacy.reporter (John Pasko) Washoe County, Nevada, United States January 01, 2012 Details
July 04, 2011 legacy.reporter (Nick Lethaby) Santa Barbara County, California, United States January 01, 2012 Details
April 29, 2007 RaisingButterflies.org Salt Lake County, Utah, United States November 28, 2011 Details
June 21, 2008 RaisingButterflies.org Utah County, Utah, United States November 26, 2011 Details
May 27, 2009 RaisingButterflies.org Davis County, Utah, United States November 26, 2011 Details
June 05, 2011 gerryq Latah County, Idaho, United States November 11, 2011 Details
June 10, 2011 Matt ODonnell Bernalillo County, New Mexico, United States September 11, 2011 Details
May 21, 2011 Matt ODonnell Bernalillo County, New Mexico, United States August 08, 2011 Details
May 29, 2011 Jdammarell Pend Oreille County, Washington, United States July 23, 2011 Details
June 11, 2011 davidwdroppers Chelan County, Washington, United States June 15, 2011 Details
June 29, 1987 legacy.reporter (unknown) Alpine County, California, United States May 01, 2011 Details
July 01, 1987 legacy.reporter (unknown) Tuolumne County, California, United States May 01, 2011 Details