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Ceanothus Silkmoth (Hyalophora euryalus)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Ceanothus Silkmoth.




A moth with many similar-looking relatives, the Ceanothus Silkmoth can fill the palm of an adult's hand.



 Updated: 3/19/2020; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




Ceanothus Silkmoths look a lot like Cecropia and Columbia Silkmoths. A large amount of variation exists in color and pattern of this species, so it is difficult to identify even among its own kind. This species even has subspecies that reflect hybridization. Besides its huge wingspan, other attractive features on this moth include eyespots at the wing tips, a wide band of color along the edge of the wings that can have shades of purple and pink in it, and a bright white mark on the hindwing that resembles a long, pointy comma. The bulbous body has orange and white stripes and the antennae are comb-like.

Caterpillars eat leaves from a wide range of trees like alder, birch, cherry, gooseberry, manzanita, maple, serviceberry, and willow. Because their diet is varied, this moth and its larvae can be found in a variety of habitats like woodlands and chaparral, as well as coastal areas. Look for adults when weather begins to warm and for caterpillars a few months after that.


General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Insect antennae icon
Flying insect icon
Patterned insect icon
Rounded insect body icon
Striped or banded insect icon


Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Lepidoptera
        Family: Saturniidae [ View More ]
          Genus: Hyalophora [ View More ]
            Species: euryalus
Identifying Information
Size, Colors, Descriptors
Scientific Name: Hyalophora euryalus
Category: Butterfly or Moth
Size (Adult; Length): 89mm to 127mm (3.47in to 4.95in)
Colorwheel Graphic Colors: brown; white; orange; purple; pink; maroon; black
Descriptors: white pointed comma; wing tip eyespot; pink border; huge; big rounded wings; comb antennae; orange white striped body; flying
Relative Size Comparison
Lo: 89mm | Hi: 127mm
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 Maine graphic
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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
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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 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


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.