Moths Make Visitors Ill at 2 U.S. Parks

A population explosion of tussock moths in Sequoia and Kings Canyon national parks has prompted the National Park Service to warn visitors that the caterpillars of these moths can cause an itchy rash on some people and respiratory problems in others.

Three or four visitors a day have been going to the ranger station complaining of a contact dermatitis, said Kris Fister, parks spokeswoman. “We’re advising people to wear long sleeves,” she added.

There is also a risk of respiratory problems caused by inhaling airborne caterpillar hairs, according to the Forest Service. Park visitors who notice respiratory problems should seek medical help immediately.