The Idaho Transportation Department (ITD) shared skin-crawling video of a snow plow clearing a massive number of Mormon crickets from the roadway.

On July 21, ITD took to Facebook to share video captured on State Highway 51 last week.

In the video, a snow plow removes Mormon Crickets from the highway as they present a hazard for drivers.

“Watch out for slick spots,” ITD said.

The insects were named for their attacks on Mormon crops in Utah in the 1800s, but they’re actually a type of katydid that can grow up to 3 inches in length and eat dozens of pounds of crops during their 100 day life cycle. They can’t fly but they can walk about a mile per day.

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