California is having a dragonfly summer, with unusually large swarms turning up around Bay Area parks, Fresno County farms and other parts of the state.
Experts told the Associated Press that warm monsoon storms in late spring and early summer likely created ideal breeding conditions. Oakland residents have reported groups numbering around 100, while farmers have watched the insects patrol fields 10 to 20 feet overhead.
No, this is not the insect apocalypse
Many of the visitors are believed to be wandering gliders, a migratory species capable of traveling great distances by using shifts in air pressure. Dragonfly expert Kathy Biggs described the insects as effectively surfing weather systems.
They are also welcome freeloaders. Dragonflies hunt mosquitoes, flies, aphids, moths and other insects, giving farms and backyards free aerial pest control. California Academy of Sciences entomologist Chris Grinter said dragonflies succeed in more than 90% of their hunts.
Most of their lives happen underwater
Dragonflies spend at least six months—and sometimes years—as wingless aquatic nymphs before emerging, shedding their skin and taking flight. Their adult lives generally last only weeks or months.
California has roughly 70 dragonfly species, most of which stay close to where they emerge. The migratory species can gather briefly, then depart as pressure systems shift. So enjoy the tiny fighter-jet convention while it is in town. They have mosquitoes to delete.
Facts first. Side-eye included.
DJF separates what is confirmed from what is claimed—and tells you why this particular mess is worth your time.