- 2 minutes, 39 seconds
The Dragonfly Mercury Project is a nationwide program that pairs scientific efforts to understand mercury pollution risks with public engagement and education. Mercury is a toxic contaminant that threatens human and wildlife health, arriving in even remote national parks through rain and snow. Dragonfly larvae serve as indicators of mercury contamination in fish and throughout aquatic food webs. Every year, national parks work with community and citizen scientists to collect dragonfly larvae for this study.