Insect Identification
Insect Identification

Pine Sawyer Beetle - (Ergates spiculatus)

Authored By Staff Writer | Last Updated: 1/27/2014

Since the Pine Sawyer Beetle loves high altitudes and evergreens, the Rocky Mountains are the right place to call home.

Pine Sawyer Beetles are found in coniferous forests at elevations over 1,200 meters. Ponderosa Pine tree and Douglas Firs are preferred habitat. Active at dusk, adults can be seen flying near lights (males) or walking on logs or stumps. The pronotum ('shoulder' area) has spines on it and their armor-like wings are highly textured.

Females lay fertilized eggs in the bark of dead or decaying trees, stumps and logs. Larvae hatch and proceed bore through dead wood, feeding on the sap inside as well as the heartwood in the center. They emerge as adults in summer, leaving behind their tunnels and capsule-shaped exit holes.

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Category: Beetle
Common name: Pine Sawyer Beetle
Scientific Name: Ergates spiculatus
Other Names: Spiny Wood Borer Beetle, Ponderous Pine Borer Beetle, Spine-Necked Longhorn Beetle

  Kingdom: Animalia
   Phylum: Arthropoda
    Class: Insecta
     Order: Coleoptera
      Family: Cerambycidae
       Genus: Ergates
        Species: spiculatus

Adult Size (Length): 40mm to 65mm (1.57in to 2.56in)

Identifying Colors: brown; black

Additional Descriptors: flying, neck, spikes

North American Reach (Though Not Limited To*): Arizona, California, Idaho, Montana, Nevada, Oregon, Washington,

* Keep in mind that insect reach is not governed by lines on a map and therefore may appear in areas/regions/states beyond those listed above.