What's That Bug? does not endorse extermination

Subject: Odd markings and body shape…
Location: Northwestern Montana
July 28, 2017 3:29 pm
Hello from Montana! I’ve seen these a few times, but rarely had I seen one sit still long enough to take a photo. Fairly large, the wings and body shape are particularly interesting… but what exactly is it? I apologize for the photo not being a tad more clear, I did zoom in after taking the photo, I didn’t want to get too close!
Signature: ~~Margaret

Cottonwood Crown Borer

Dear Margaret,
This is one of the wasp-mimic Clearwing Moths in the family Sesiidae, and we quickly identified it as a Cottonwood Crown Borer,
Sessia tibialis, on iNaturalist.  American Hornet Moth is another common name according to BugGuide where it states that the range is:  “Nova Scotia and New England, west to Vancouver, British Columbia, Rocky Mountains of Wyoming, Colorado and New Mexico, west to the Pacific Coast.”

What's That Bug? does not endorse extermination
Location: Montana

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