North American Butterflies and Moths List

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Butterflies of North America

Spalding's Dotted-Blue (Euphilotes spaldingi)
JPG -- species photo

Spalding's Dotted-Blue (Euphilotes spaldingi [Barnes & McDunnough])

Wing span: 1 - 1 1/8 inches (2.5 - 2.9 cm).

Identification: Upperside of male blue with wide dark border; female brown with orange band on both fore- and hindwings. Underside of both sexes gray with black spots and orange marginal bands on both wings.

Life history: Males patrol erratically for females.

Flight: One brood from June-July.

Caterpillar hosts: Eriogonum racemosum in the buckwheat family (Polygonaceae).

Adult food: Nectar from flowers including Eriogonum jamesi.

Habitat: Rocky outcrops on elevated pinyon-juniper plateaus.

Range: Northeastern New Mexico, northern Arizona, southwest Colorado, Utah, and western Nevada.

Conservation: Many populations on public lands are not in need of specific protection.

The Nature Conservancy Global Rank: 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: Monitor populations and habitats for invasion of exotic plants such as cheatgrass.

References:


Scott, J. A. 1986. The butterflies of North America. Stanford  University Press, 

    Stanford, Calif. 583 pages, 64 color plates.



Tilden, J. W. 1986. A field guide to western butterflies.  Houghton-Mifflin Co., 

    Boston, Mass. 370 pages, 23 color plates.

Author: Jane M. Struttmann

Spalding's Dotted-Blue (Euphilotes spaldingi)
distribution map
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