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Red Milkweed Beetle (Tetraopes tetrophthalmus)

Detailing the physical features, habits, territorial reach and other identifying qualities of the Red Milkweed Beetle

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Image Credit: Joy C., taken at the Horticultural Art Society Heritage Garden in Colorado Springs, CO
Full-sized image of the Red-Milkweed-Beetle Thumbnail image of the Red-Milkweed-Beetle
Image Credit: Joy C., taken at the Horticultural Art Society Heritage Garden in Colorado Springs, CO
Full-sized image #2 of the Red-Milkweed-Beetle Thumbnail image #2 of the Red-Milkweed-Beetle
Image Credit: Tim, taken on the Appalachian Trail, PA
Full-sized image #3 of the Red-Milkweed-Beetle Thumbnail image #3 of the Red-Milkweed-Beetle
Image Credit: Tim G. from PA
Full-sized image #4 of the Red-Milkweed-Beetle Thumbnail image #4 of the Red-Milkweed-Beetle

The Red Milkweed Beetle is dotted with symmetrical black spots on its body, making it a bit more visible on its green hostplant.

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General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Insect antennae icon
Patterned insect icon


Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Coleoptera
        Family: Cerambycidae
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          Genus: Tetraopes
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            Species: tetrophthalmus
Identifying Information
Size, Colors, Features
Scientific Name: Tetraopes tetrophthalmus
Category: Beetle
Size (Adult; Length): 8mm to 15mm (0.31" to 0.59")
Colorwheel Graphic Colors: red; black
Descriptors: black dots on body; long black antennae; black legs; dusty; flocked; fuzzy; big and small spots

Relative Size Comparison
Typical Size Between 8mm (0.3in) and 15mm (0.6in)
Lo: 8mm
Md: 11.5mm
Hi: 15mm
Territorial Map*
U.S., Canada, and Mexico
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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 Red Milkweed Beetle 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 Red Milkweed Beetle. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.


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