Idaea demissaria
(Hübner, [1831])
Red-bordered Wave, Red-bordered Wave Moth
Idaea demissaria is a small geometrid in the Geometridae, commonly known as the red-bordered wave moth. The is characterized by distinctive reddish marginal bands on the wings and is distributed across North America. Three are recognized: I. d. columbia, I. d. demissaria, and I. d. ferrugata. The species is assigned MONA/Hodges number 7114.
Pronunciation
How to pronounce Idaea demissaria: /ɪˈdiːə dɛmɪsˈɛəriə/
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Identification
The red-bordered wave can be identified by the reddish or pinkish bands along the outer margins of both forewings and hindwings, contrasting with a pale or whitish ground color. The wings exhibit the typical wavy or scalloped margins characteristic of the Idaea. The is small-bodied with relatively broad wings. differ in the intensity and extent of the red marginal coloration, with I. d. ferrugata showing more extensive rusty or ferruginous tones.
Images
Distribution
North America, with records including the United States (specifically Vermont and other states). The three recognized have distinct geographic ranges: I. d. columbia in the Pacific Northwest region, I. d. demissaria in eastern North America, and I. d. ferrugata with a broader distribution.
Similar Taxa
- Idaea scopulaSimilar size and wing shape, but lacks the distinctive red marginal bands; typically shows more uniform gray or brown coloration without contrasting borders.
- Idaea biselataOverlaps in distribution and general appearance, but has more pronounced dark discal spots and lacks the characteristic red wing borders of I. demissaria.
- Idaea furciferataAnother small geometrid with pale wings, but exhibits different wing pattern elements including forked or angled lines rather than simple marginal bands.