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American Idia (Idia americalis)


Detailing the physical features, habits, territorial reach and other identifying qualities of the American Idia


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Image Credit: Alex -icycatelf- Bowen
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Image Credit: Dave and Glenda, E., taken in Swaledale, IA
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A lover of lichens, the American Idia Moth can be found on tree trunks, stone facings, and other areas hosting its flaky forage.



Updated: 06/19/2023; Authored By Staff Writer; Content ©www.InsectIdentification.org
American Idia moths come in light and dark varieties. Light ones may be pale gray or beige near the head and thorax with darker scalloped lines crossing the wings. Dark versions are dark brown, almost black, with white scalloped lines. All individuals have a warm brown or bronze spot near each forewing's edge interferes with the scalloped lines. A white or ivory crescent crowns the larger brown spots. A band of medium brown along the bottom of the wings is broken into segments.

The American Idia is a kind of Litter Moth. It is small and nocturnal. Look for them at night, feeding on lichens attached to tree trunks from spring through autumn. Two or more broods can be produced each year. ©InsectIdentification.org


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General Characteristics


Capability, Shape, Texture/Pattern, Benefits, Dangers
Flying insect icon
Patterned insect icon


Taxonomic Hierarchy


Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Lepidoptera
        Family: Erebidae
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          Genus: Idia
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            Species: americalis

Identifying Information


Size, Colors, Features
Scientific Name: Idia americalis
Category: Butterfly or Moth
Size (Adult; Length): 20mm to 30mm (0.78" to 1.18")
Colorwheel Graphic Colors: brown; white; orange
Descriptors: bronze; orange spot; lichen; flying


Relative Size Comparison


Typical Size Between 20mm (0.8in) and 30mm (1.2in)
Lo: 20mm
Md: 25mm
Hi: 30mm

Territorial Map*


U.S., Canada, and Mexico
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Alaska  
Hawaii  
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the American Idia may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the American Idia. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.
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