Invasive stinging caterpillars reemerge in Hawaii as authorities release thousands of wasps to counteract them

Stinging nettle caterpillars, originally from Southeast Asia, have returned to Hawaii after being first spotted over 20 years ago. Authorities are now battling the invasive species by releasing thousands of parasitic wasps to control their population. The wasps lay their eggs in the caterpillars, eventually killing them. This biological control method is crucial as the caterpillars pose a significant threat to local ecosystems and public health due to their painful stings. The effort underscores the importance of managing invasive species to protect both the environment and human health.