Idia scobialis

Distinguished from similar Idia species by its smoky gray-brown coloration and specific geographic range. The combination of small size (20 mm wingspan), unpatterned or subtly patterned forewings, and eastern North American distribution helps separate it from congeners. Exact identification may require examination of genitalia or reference to regional keys.

Wingspan approximately 20 mm. As a member of the litter moth genus Idia, it has relatively broad, rounded forewings with muted coloration. The specific epithet 'scobialis' (meaning sawdust-like) suggests a dusty or smoky gray-brown appearance.

Associated with forest floor litter and areas where dead leaves accumulate. As a detritivore in larval stages, it requires habitats with substantial organic debris.

North America: Michigan, southern Quebec, and Maine south to Florida and at least Kentucky. Records also include Vermont.

One generation per year. Adults are active during the warmer months; specific flight period not documented in available sources.

Larvae feed on detritus, specifically including dead leaves.

Univoltine (one generation per year). Complete metamorphosis with egg, larva, pupa, and adult stages. Larval stage feeds on detritus.

Larval detritivory contributes to decomposition and nutrient cycling in forest ecosystems by processing dead leaf material.

Attracted to blacklight, making it observable by moth enthusiasts. No documented economic or agricultural significance.

• Other Idia speciesSeveral congeners share similar size, habitat, and general appearance; I. scobialis is distinguished by its smoky coloration and eastern North American range, though precise separation often requires expert examination

• litter moth
• detritivore
• univoltine
• eastern North America

• BugGuide
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• GBIF taxonomy match
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• NCBI Taxonomy
• Catalogue of Life
• Bug Eric: 2025 City Nature Challenge Recap for Kansas City Metro