#7716/7717 stigma/manitobensis

Spiny/ Manitoba Oakworm Moths

Anisota stigma (Fabricius, 1775) and/or A. manitobensis McDunnough, 1921

Family: Saturniidae

Status: Extremely rare resident(s).

Range: Most records of Spiny Oakworm Moths are from east of the Mississippi River and from Oklahoma and Texas. The very few Manitoba Oakworm Moth records indicate a more northerly distribution (Canada). The Nebraska record is the only one from the United States.

Larval Hostplant(s):  Oaks (Quercus sp.). Lindens (Tilia) has also been cited.

NENHP Ranking: Not listed.

Broods/Flight Times: One midsummer flight.

Habitat: Deciduous woodlands

Avg. Wingspan: Approximately 1 3/4 Inches.

Found at: Niobrara Valley Preserve.

Overwintering: As pupa on or under the soil surface.

Similar Species: The Spiny Oakworm has dark speckling and lacks the prominent pink shading of manitobensis.

Notes: While frequently listed as separate species in literature, Dr. James Tuttle (co-author of The Wild Silkmoths of North America) is of the opinion that further research is needed to validate this position. (personal communication)

🔗Links: Moth Photographers Group (stigma), Moth Photographers Group (manitobensis), BugGuide.net (stigma), BugGuide.net (manitobensis).

Anisota manitobensis, Smith Falls State Park, Cherry County, BP
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