Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Bauer's Dotted-Blue
Euphilotes baueri (Shields, 1975)

Family: Lycaenidae
Subfamily: Polyommatinae
Identification: Male pale blue above without orange hindwing band. Female gray-brown with blue scaling extensive to almost none. Orange aurora band on outer edge of hindwing ranging from medium to absent. Underside snowy white with distinct black line on wing margins. Black spotting bold. Pale orange band on margin of hindwing narrow.
Wing Span: 3/4 - 7/8 inches (1.9 - 2.2 cm).
Life History: Males patrol all day near host plants to find receptive females. Eggs are laid singly on host plant flowers; caterpillars eat flowers and fruits, and are protected by ants. Chrysalids hibernate in sand or leaf litter.
Flight: One flight; mid-April to late June.
Caterpillar Hosts: Various wild buckwheats (Eriogonum species)
Adult Food: Flower nectar especially that from Eriogonum species.
Habitat: Dry slopes and flats with scattered short brush.
Range: East and northeastern California, Nevada, and western Arizona.
Conservation: Habitats may be susceptible to invasion by cheatgrass. Surveys should be undertaken.
NCGR: G2,G3 - for species. Imperiled because of rarity (6 to 20 occurrences), or because of other factors demonstrably making it very vulnerable to extinction throughout its range. (Endangered throughout its range). OR very rare or local throughout its range or found locally in a restricted range . The Nature Conservancy rank of 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) applies to a subspecies from the San Bernardino Mountains of southern California.
Management Needs: Maintain habitat together with host plants of all known populations. Survey populations and their susceptibility to invasive alien weeds.
Comments: NULL