Sphinx vashti

Strecker, 1878

Vashti Sphinx

Sphinx vashti, the Vashti sphinx, is a in the . It is found in western North America from British Columbia to Manitoba and south to southern California, Nevada, Arizona, New Mexico, and western Texas. The exhibits highly variable coloration ranging from pale to very dark gray, with distinctive black dashes and a black featuring . It has one per year.

Sphinx vashti 0zz by Photo by David J. Stang. Used under a CC BY-SA 4.0 license.

Sphinx vashti, female, upperside. United States, Colorado, Garfield, Glenwood Springs by The Trustees of the Natural History Museum, London. Used under a CC BY 3.0 license.

Sphinx vashti, male, underside. United States, Montana, Custer, Miles City by The Trustees of the Natural History Museum, London. Used under a CC BY 3.0 license.

Pronunciation

How to pronounce Sphinx vashti: /sfɪŋks ˈvæʃtaɪ/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The Vashti sphinx can be distinguished from similar by the combination of highly variable coloration (pale to very dark gray) with a consistent pattern of black dashes ending with the topmost dash at the tip, and the contrasting black with . The single and specific western North distribution also aid identification. Similar in the Sphinx may share general pattern elements but differ in geographic range and specific wing markings.

Images

Appearance

highly variable in color, ranging from pale to very dark gray with paler gray at the base of the , tip, and outer margin. A series of black dashes runs across the forewing, with the topmost dash reaching the wing tip. is black with . Wing length varies considerably among individuals.

Habitat

Specific preferences are not well documented in available sources.

Distribution

Western North America from British Columbia east to Manitoba, south to southern California, Nevada, central Arizona, New Mexico, and western Texas. Records also include Alberta and Saskatchewan in Canada.

Seasonality

One per year. activity period not explicitly documented in available sources.

Diet

feed on snowberry (Symphoricarpos albus) and coralberry (Symphoricarpos orbiculatus). feeding habits not documented.

Host Associations

Symphoricarpos albus - larval snowberry
Symphoricarpos orbiculatus - larval coralberry

Life Cycle

One per year. with , , , and stages. Larvae feed on snowberry and coralberry. details not documented.

Behavior

No specific behavioral observations documented in available sources.

Ecological Role

Larval on Symphoricarpos . ecological role not documented. Specific functions not described in available sources.

Human Relevance

Not documented as an agricultural pest or otherwise significant to human activities. Occasionally observed during events and surveys.

Similar Taxa

Sphinx chersisSimilar size and general , but S. chersis is an ash with different pattern and more eastern distribution
Sphinx kalmiaeCongeneric with similar body plan, but differs in associations (lilac and olive ) and specific markings
Sphinx drupiferarumAnother member of Sphinx with overlapping range, but distinct pattern and preferences

More Details

Taxonomic Note

Described by Strecker in 1878. The specific epithet 'vashti' refers to the biblical figure Vashti, wife of Ahasuerus in the Book of Esther, following a pattern of classical and biblical references common in Strecker's .

Population Biology

The ' single () contrasts with some related that have multiple per year, suggesting to the seasonal availability of its plants or climatic constraints in its western North range.