Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Cassiope Blue
Plebejus cassiope (J. Emmel & T. Emmel, 1998)
Family: Lycaenidae
Subfamily: Polyommatinae
Identification: Upperside of male metallic, pale gray-blue, female dark brown. Underside dark brown with pattern of black spots in white field on hindwing. Forewing submarginal black spots sq1uarish or oblong. Hindwing usually has black discal spot present.
Wing Span: 3/4 - 1 inches (2.1 - 2.5 cm).
Life History: Eggs are laid singly on leaves, bracts, or sepals of the host plant. Caterpillars or chrysalids hibernate.
Flight: One flight from early July to September.
Caterpillar Hosts: Cassiope mertensiana.
Adult Food: Flower nectar.
Habitat: Lush subalpine slopes.
Range: Limited range in California in Trinity Alps and near crest of Sierra Nevada.
Conservation: Study conservation needs, if any, of subspecies kelsoni Emmel and Emmel in Trinnity Alps.
NCGR: G3,G4 -Very rare or local throughout its range or found locally in a restricted range OR Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery. Subspecies kelsoni is rank T1 - Critically imperiled because of extreme rarity (5 or fewer occurrences, or very few remaining individuals), or because of some factor of its biology making it especially vulnerable to extinction. (Critically endangered throughout its range).
Management Needs: Study conservation needs and implement if necessary.
Comments: NULL
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Verified Sightings

Displaying 25 - 34 of 34 verified sightings
Observation date: Jul 28, 2003
Submitted by: stevekohler (Steve Kohler)
Region: Missoula County, Montana, United States
Verified by: stevekohler (Steve Kohler)
Verified date: Jan 29, 2008
  Details
Observation date: Jul 06, 2001
Submitted by: stevekohler (Steve Kohler)
Region: Deer Lodge County, Montana, United States
Verified by: stevekohler (Steve Kohler)
Verified date: Jan 29, 2008
  Details
Observation date: Aug 15, 1982
Submitted by: stevekohler (Steve Kohler)
Region: Ravalli County, Montana, United States
Verified by: stevekohler (Steve Kohler)
Verified date: Jan 29, 2008
  Details
Observation date: Jul 26, 2000
Submitted by: stevekohler (Steve Kohler)
Region: Granite County, Montana, United States
Verified by: stevekohler (Steve Kohler)
Verified date: Jan 29, 2008
  Details
Observation date: Jul 29, 2006
Submitted by: legacy.reporter (Greg Chapman)
Region: Inyo County, California, United States
Verified by: legacy.verifier (John Emmel)
Verified date: Jan 07, 2008
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: Mono County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: El Dorado County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: Tuolumne County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: Siskiyou County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details
Observation date: unknown
Submitted by: legacy.reporter
Region: Mono County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
  Details

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