Moths of North Carolina
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View PDFErebidae Members: 613 NC Records

Idia aemula Hübner, 1814 - Common Idia Moth


Taxonomy
Superfamily: Noctuoidea Family: ErebidaeSubfamily: HerminiinaeP3 Number: 930471.00 MONA Number: 8323.00
Comments: One of eighteen species recorded in North America (Lafontaine and Schmidt, 2010), twelve of which are found in North Carolina.
Identification
Field Guide Descriptions: Covell (1984); Beadle and Leckie (2012)Online Photographs: MPG, BugGuide, iNaturalistTechnical Description, Adults: Forbes (1954); Rings et al. (1992)Technical Description, Immature Stages: Wagner et al. (2011)                                                                                 
Adult Markings: A moderately small deltoid, similar in size to Idia americalis but more evenly shaded with smoky to yellowish-gray and not paler towards the base or along the costa. Lines are darker but not as heavy as in americalis. Both the orbicular and reniform are usually contrastingly pale yellow, although in some individuals the spots can be blackish and much darker than the ground color. The terminal line is broken into a series of spots, unlike the continuous line found in americalis (Forbes, 1954). Aemula is similar in pattern and forewing color to Idia "concisa" but has a more fuscous hindwing that is nearly concolorous with the forewing (Forbes, 1954). The median band of the forewing is also usually more diffuse in aemula than in "concisa" (Lafontaine and Schmidt, 2010).
Adult Structural Features: Like americalis and "concisa", aemula has relatively short palps, not reaching the vertex (Forbes' subgenus Epizeuxis). The third segment is blunt and blade-like with rough hair on the upper surface (Forbes, 1954).
Adult ID Requirements: Identifiable from photos showing hindwings, abdomen, or other specialized views [e.g., frons, palps, antennae, undersides].
Distribution in North Carolina
Distribution:
County Map: Clicking on a county returns the records for the species in that county.
Flight Dates:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

Click on graph to enlarge
Habitats and Life History
Habitats:
Larval Host Plants: Larvae are probably generalized detritivores, feeding on dead leaves, fungi, and other organic matter (Forbes, 1954; Wagner et al., 2011). Some individuals have been found in squirrel nests, abandoned hornet nests, and in earthball fungi (Wagner et al., 2011).
Observation Methods: Comes well to both blacklights and bait. Larvae have apparently not been observed in the wild (Wagner, et al., 2011), despite their abundance.
Wikipedia
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks: [G5 S5]
State Protection: Has no legal protection, although permits are required to collect it on state parks and other public lands.
Comments:

 Photo Gallery for Idia aemula - Common Idia Moth

82 photos are available. Only the most recent 30 are shown.

Recorded by: Steve Hall on 2020-05-25
Orange Co.
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Recorded by: Gary Maness on 2020-05-24
Guilford Co.
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Recorded by: Owen McConnell on 2020-05-15
Durham Co.
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Recorded by: Gary Maness on 2020-05-14
Guilford Co.
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Recorded by: Kyle Kittelberger, Brian Bockhahn on 2020-05-13
Moore Co.
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Recorded by: Owen McConnell on 2020-05-03
Durham Co.
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Recorded by: Gary Maness on 2020-05-02
Guilford Co.
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Recorded by: Gary Maness on 2020-04-21
Guilford Co.
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Recorded by: Gary Maness on 2020-04-14
Guilford Co.
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Recorded by: Gary Maness on 2020-04-06
Guilford Co.
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Recorded by: Gary Maness on 2020-03-26
Guilford Co.
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Recorded by: Mark Shields on 2020-01-14
Onslow Co.
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Recorded by: Gary Maness on 2019-11-10
Guilford Co.
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Recorded by: Gary Maness on 2019-10-21
Guilford Co.
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Recorded by: L. M. Carlson on 2019-10-12
Orange Co.
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Recorded by: Gary Maness on 2019-10-11
Guilford Co.
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Recorded by: Ken Kneidel on 2019-10-05
Avery Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-10-03
Madison Co.
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Recorded by: Gary Maness on 2019-10-01
Guilford Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-09-27
Madison Co.
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Recorded by: Simpson Eason on 2019-09-26
Durham Co.
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Recorded by: Gary Maness on 2019-09-21
Guilford Co.
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Recorded by: Gary Maness on 2019-09-19
Guilford Co.
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Recorded by: Owen and Pat McConnell on 2019-09-17
Graham Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-09-13
Madison Co.
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Recorded by: Owen McConnell on 2019-09-11
Graham Co.
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Recorded by: Gary Maness on 2019-09-01
Guilford Co.
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Recorded by: Mark Shields on 2019-08-30
Onslow Co.
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Recorded by: Simpson Eason on 2019-08-22
Durham Co.
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Recorded by: Gary Maness on 2019-08-22
Guilford Co.
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