Dragonflies: Canaries in the Coal Mine
Dragonflies Help Researchers Determine Mercury
The adult dragonflies that we often see flitting about near any lake or stream, are quite the common sight. But did you know that just below the water’s surface, hunting in the shallows, there are also dragonflies? Well, baby dragonflies. The larval stage of this insect—which is about the size of your thumb—is a very…