BugFinder Insects by State Spiders Butterflies & Moths Bees, Ants, & Wasps Beetles All Bugs Videos (YouTube)

Ilia Underwing (Catocala ilia)

Detailing the physical features, habits, territorial reach and other identifying qualities of the Ilia Underwing

Loading SVG image placeholder
Image Credit: Alex -icycatelf- Bowen
Full-sized image of the Ilia-Underwing-Moth Thumbnail image of the Ilia-Underwing-Moth

A bright red-orange hindwing gets lots of attention when the Ilia Underwing comes around, and fortunately that is quite often east of the Mississippi River.

Updated: 07/06/2021; Authored By Staff Writer; Content ©www.InsectIdentification.org
Though the overall color of the Ilia Underwing may be brown or gray, its flashy hindwings are bright and bold, ranging from deep fuchsia to salmon pink. Unlike many underwings, this species has two black bands that cross the hindwings instead of just one. A reniform spot with a white ring on each forewing is common though it may be less obvious on some individuals.

The caterpillar feeds on oak leaves. Ridges or bumps on each segment are contoured with black markings, accentuating their elevation. Irregular black marks also stretch along the sides of the body. The overall color of the caterpillar typically blends in well with tree bark, so it is common to find gray or brown individuals. Some, however, are mint-green, just like a lichen-covered tree trunk. The head is pale or white with a black band near the neck. The caterpillar looks chunky and rough, and its ventral (belly) side is tinted with a blush of red or pink.

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
View More
          Genus: Catocala
View More
            Species: ilia
Identifying Information
Size, Colors, Features
Scientific Name: Catocala ilia
Other Name(s): The Wife; Beloved Underwing
Category: Butterfly or Moth
Size (Adult; Length): 34mm to 45mm (1.33" to 1.77")
Colorwheel Graphic Colors: brown; gray; black; white; red; pink; orange
Descriptors: peppered; white reniform spot; fuchsia; flying;

Relative Size Comparison
Typical Size Between 34mm (1.3in) and 45mm (1.8in)
Lo: 34mm
Md: 39.5mm
Hi: 45mm
Territorial Map*
U.S., Canada, and Mexico
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
State of Illinois graphic
State of Indiana graphic
State of Iowa graphic
State of Kansas graphic
State of Kentucky graphic
State of Louisiana graphic
State of Maine graphic
State of Maryland graphic
State of Michigan graphic
State of Minnesota graphic
State of Mississippi graphic
State of Missouri graphic
State of Montana graphic
State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Ilia Underwing 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 Ilia Underwing. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.


Site Disclaimer  |  Privacy Policy  |  Cookies  |  Sitemap

Beetle Identification Butterfly Identification Caterpillar Identification Spider ID

www.InsectIdentification.org • Content ©2006- InsectIdentification.org • All Rights Reserved. The InsectIdentification.org logo, its written content, and watermarked photographs/imagery are unique to this website (unless where indicated) and is protected by all applicable domestic and international intellectual property laws. This resource uses publically-released information. Material presented throughout this website is for entertainment value and should not to be construed as usable for scientific research or medical advice (regarding bites, etc...).Please consult licensed, degreed professionals for such information. By submitting images to us (InsectIdentification.org) you acknowledge that you have read and understood our Site Disclaimer as it pertains to "User-Submitted Content". When emailing please include your location and the general estimated size of the specimen in question if possible. Please direct all inquiries and comments to insectidentification AT gmail.com.

www.InsectIdentification.org • All Rights Reserved • Content ©2006-

Facebook Logo YouTube Logo