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Glover's Silkmoth (Hyalophora columbia gloveri)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Glover's Silkmoth.




The large Glover's Silkmoth is considered by many to be a subspecies of the equally large and physically similar Columbia Silkmoth, though others see it as a stand-alone moth.



 Updated: 6/4/2020; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




Classification of moths and other insects can sometimes change, and it is possible that this one will, but the Glover's Silkmoth is generally considered a subspecies that resides in the western states and provinces and as well as some central provinces. The Columbia Silkmoth is found in the Northeast and Great Lakes area, so the moth's location is really helpful in trying to determine its identity.

Glover's Silkmoth is a rich brown color with a white line crossing the lower part of the wings. Beneath the white line is a band of gray-brown and a tan border. A thin curvy line undulates in the tan area, creating 'u' shapes. At the wing tips, a white squiggly line looks almost pearlescent on a pink background, and a dark blue and black eyespot is next to it. A large white crescent sits on each hindwing and is visible when they are spread open and flat. Smaller white dashes sit in the center of the brown parts of the forewings. The moth has a hairy, gray collar by the head. Its hairy thorax is the same shade of brown as the wings, and a large white patch is near the head. Antennae are large and thick with comb-like teeth. Legs are brown and also thick with hair.

Caterpillars are green or yellow. Depending on its maturity, it may be yellow and black with tufts of black spikes in rows on the body, or is could be green and covered in white, yellow, and blue knobby bumps. It feeds on an assortment of plants like buffalo berry, Russian olive, willow, larch, bitter brush, chokecherry, and wild roses. One brood is produced each year, but two may be possible in Mexico and Arizona. Look for adults in late spring through midsummer in woodlands, backyard gardens, and areas with wet soil.


General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Flying insect icon
Patterned insect icon
Rounded insect body icon


Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Lepidoptera
        Family: Saturniidae [ View More ]
          Genus: Hyalophora [ View More ]
            Species: columbia gloveri
Identifying Information
Size, Colors, Descriptors
Scientific Name: Hyalophora columbia gloveri
Category: Butterfly or Moth
Size (Adult; Length): 80mm to 100mm (3.12in to 3.90in)
Colorwheel Graphic Colors: brown; white; gray; tan; ivory
Descriptors: huge; large; rounded; brown; white marks; white squiggle; eyespot wing tip; flying
Relative Size Comparison
Lo: 80mm | Hi: 100mm
Territorial Reach (A-to-Z)
U.S., Canada, and Mexico
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Canadian National Flag Graphic
Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
Mexico
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns.
Territorial Map
U.S., Canada, and Mexico
Alaska  
Hawaii  
Prince Edward Is.  
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State of Delware graphic
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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
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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
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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


Butterfly and Moth Anatomy
Graphic showing basic anatomy of a common North American butterfly and moth insect
1
Antennae: Butterflies and Moths have a pair of antennae on the head used for sensing.
2
Head: The head is home to the insect's eyes, antennae, and proboscis.
3
Thorax: Home to the three pairs of legs as well as vital internal organs.
4
Abdomen: Contains vital internal organs such as the heart(s) and reproduction facilities.
5
Forewing: The upper, forward wing pair used for flying.
6
Hindwing: The lower, rearward wing pair used for flying.
NOTE: Butterflies and Moths are part of the Lepidopteran order as they share many similarities.