If you've noticed more miller moths this year, you're right. Millions of millers have invaded southeastern Wyoming this month. According to meteorologist Don Day, a blizzard in early May is to blame for the larger moth migration.

"One reason the millers are worse this year is that we had a big late spring snow. Those big May snow dumps knock out a lot of emerging tree pollen, which brings more moths," Day said.

Cotton falling from trees has also been especially bad this year, which Day attributes to the spring storms. All over town, Cottonwoods have covered yards with white, fluffy "snow". Thankfully, Cottonwood season typically subsides in July and August.

Warmer weather will also send the millers headed for higher elevations. Army Cutworm Moths migrate from the plains of Wyoming, Colorado, Nebraska, and Kansas to the mountains, following a trail of nectar from flowering plants and enjoying cooler temperatures.

Carrey Avenue cottonwood tree covers Capitol construction crew
Cottonwood tree outside the Wyoming State Capitol

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