PHOENIX (3TV/CBS 5) - There's a caterpillar invasion across the Valley. And, many viewers have posted on our "Weather Authority" Facebook Page about all the yellow and green bugs you're seeing crawling all around their neighborhoods! One local expert says this is due to the active monsoon.

"In all honesty, I thought we were going through the 10 plagues of exodus" said Phoenix resident Jennifer Farrell. Her yard is overrun with caterpillars. "The dogs have been eating them... they've made friends, so that's been fun" she told Arizona's Family. On Thursday, Farrell's pool had thousands of caterpillars and they've been using a scooper to take them all out.

Farrell is not the only one who's dealing with the bug boom. The yellow caterpillars popping up all across the valley have sparked conversations among many neighborhoods. So, the question is why? Entomologist Derek Kellogg says if plants are thriving, then caterpillars are too.

"They're coming down to the Valley now because they basically ate their fill they they grew up on and they're now looking for a place where they can dig in and turn into a pupa," said Kellogg.

The caterpillars are totally harmless, so what should you do if you see them in your yard? "My big suggestion would be just to be a little bit on the patient side... these caterpillars will work their way on through pretty quickly" Kellogg added. In a few weeks Kellogg says they'll turn into moths and fly away. For more information on Butterfly Wonderland, where Kellogg works, click here.


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