Dragonflies reveal how biodiversity changes in time and space. In one of the first studies of its kind, ecologists monitored East Texas dragonfly communities for years to show that simple mechanisms could be used to predict how biodiversity varies across time and space. Source 4o.
Dragonflies are efficient predators. A study has found that small, fiercely predatory damselflies catch and eat hundreds of thousands of insects during a single summer -- in an area surrounding just a single pond. In terms of weight, this equates to a total prey mass of just under a kilo. Dragonflies mostly catch different kinds of midges, but also large numbers of other insects. Source 1p.