Unsilvered Fritillary
Speyeria adiaste (W.H. Edwards, 1864)
Family: Nymphalidae
Subfamily: Heliconiinae
Identification: Upperside of male pale reddish-tan to bright brick red; female larger and paler than male. Dark markings scattered and small except for bold postmedian line. Underside pale yellow to gray. Hindwing spots unsilvered and barely contrasting with background color.
Wing Span: 2 - 2 3/8 inches (5 - 6.1 cm).
Life History: Eggs are laid singly on fallen leaves and twigs near violets. First-stage caterpillars hibernate unfed, feeding on violet leaves in the spring.
Flight: One flight from June-July.
Caterpillar Hosts: Violets including Viola quercetorum.
Adult Food: Flower nectar.
Habitat: Openings in redwood and coniferous forests, oak woodlands, chaparral.
Range: Very local, restricted range in California County north to San Mateo County; east to north Los Angeles County and Kern County.
Conservation: Subspecies atossa is extinct; subspecies adiaste has a limited range and may be in jeopardy; while subspecies clemencei has the most extensive range.
NCGR: G3 - Very rare or local throughout its range or found locally in a restricted range (21 to 100 occurrences). (Threatened throughout its range).
Management Needs: Inventory and monitor subspecies adiaste populations and make conservation assessment.
Comments: NULL
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Verified Sightings
Displaying 73 - 85 of 85 verified sightings
Observation date: Jun 25, 1930
Submitted by: legacy.reporter (Chris Henne)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 10, 1922
Submitted by: legacy.reporter (J. A. Comstock)
Region: Los Angeles County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jul 16, 1984
Submitted by: Ken Davenport (Ken Davenport)
Region: Monterey County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 05, 1959
Submitted by: legacy.reporter (John S. Garth)
Region: Ventura County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Apr 22, 2008
Observation date: unknown
Submitted by: legacy.reporter
Region: San Mateo County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Santa Barbara County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Monterey County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Kern County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Santa Cruz County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Santa Clara County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Los Angeles County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: San Francisco County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: San Luis Obispo County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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