Meet the Brown-tail Moth (Euproctis chrysorrhoea)

Hairs from the caterpillars are toxic for humans, causing a poison ivy-like itchy rash of up to sometimes weeks-long duration due to mechanical and chemical irritation. Direct contact with larvae is not necessary, as the hairs are shed and can become windblown.Toxins in the hairs remain potent for up to three years. Outdoor activities such as mowing a lawn or raking leaves in the fall can cause exposure.