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Northwestern Fritillary
Speyeria hesperis (W.H. Edwards, 1864)
Family: Nymphalidae
Subfamily: Heliconiinae
Identification: Quite variable. Upperside orange-brown, often darker at base, with black outer margins especially on forewing; male has black scales on veins. Underside of hindwing with basal disk or light brown orange-brown with pale submarginal band; spots silvered or unsilvered.
Wing Span: 2 - 2 3/4 inches (5 - 7 cm).
Life History: Males patrol during the day in open areas. Eggs are laid singly on leaf litter near host plant. Unfed first-stage caterpillars overwinter, emerging in spring to feed on leaves.
Flight: One flight from June-October, mainly July-August.
Caterpillar Hosts: Violets.
Adult Food: Flower nectar including Gaillardia, rabbitbrush, purple mints, and shrub cinquefoil.
Habitat: Forest openings, meadows, and open hillsides.
Range: Western mountains from central western Alaska, Yukon, and Northwest Territories south to central California, Arizona, and New Mexico.
Conservation: Not usually of conservation concern. Subspecies elko Austin and hanseni Emmel and Emmel are of conservation concern because of their small ranges. The former may be threatened by invasive alien weeds including smooth brome and/or cheatgrass.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
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Verified Sightings
Displaying 289 - 312 of 541 verified sightings
Observation date: Jul 15, 2007
Submitted by: legacy.reporter (William Bouton)
Region: Sierra County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 31, 2010
Observation date: Sep 26, 2010
Submitted by: paulopler (Paul Opler)
Region: Teton County, Wyoming, United States
Verified by: paulopler (Paul Opler)
Verified date: Dec 31, 2010
Observation date: Jul 05, 1985
Submitted by: legacy.reporter (Jim Brock)
Region: Amador County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 31, 2010
Observation date: Jul 18, 2010
Submitted by: legacy.reporter (Paul Opler and EviBuckner-Opler )
Region: Fremont County, Idaho, United States
Verified by: paulopler (Paul Opler)
Verified date: Dec 31, 2010
Observation date: Jun 22, 2000
Submitted by: legacy.reporter (unknown)
Region: Modoc County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 31, 2010
Observation date: unknown
Submitted by: BAMONA
Region:
Verified by: BAMONA
Verified date: Sep 06, 2010
Observation date: Aug 12, 1984
Submitted by: legacy.reporter (R. Langston, D. Parkinson)
Region: Alpine County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Apr 02, 2010
Observation date: Sep 07, 1983
Submitted by: legacy.reporter (R. Kelson, A. Shapiro)
Region: Siskiyou County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Apr 02, 2010
Observation date: Aug 10, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Siskiyou County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Oct 01, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 11, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Siskiyou County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Sep 06, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 16, 1979
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Siskiyou County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 27, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Sep 08, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 06, 1978
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 16, 1979
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Sep 05, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Jul 30, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 27, 1979
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Siskiyou County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 04, 1979
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 06, 1978
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Siskiyou County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Aug 06, 1978
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Siskiyou County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
Observation date: Jun 24, 1976
Submitted by: legacy.reporter (A. M. Shapiro)
Region: Trinity County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Mar 09, 2010
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