06/09/2026
Some great information about the infamous June Beetle (beetles).
In honor of June Bug Day, we've asked OBS entomologist James Hung to tell us a little more about them...
"June bug" is a catch-all term for many members of beetle family that emerge in notable numbers in June (or May, in Oklahoma). Even the genus Phyllophaga, comprising most of the common brown beetles that struggle upside down on your front porch, contains more than 400 species (!!) in North America. They spend up to several years underground developing as larvae (grubs) where they help cycle nutrients and aerate the soil. June bugs have brief adult lives eating leaves and trying their darndest to reproduce—it's hard to get mad at them when you know that the beetle that just crashed into you spent 3 years underground prepping for just few nights' worth of activity.
Most species are nocturnal and navigate in part using the moon as reference—hence why they end up getting "sucked into" porch lights and other sources of artificial light at night. They seem exceptionally clumsy because the digging part of their biological machinery requires more fine-tuning for their daily survival than their aboveground navigational abilities: they need to be able to burrow into the soil to avoid predators by day and to lay eggs, whereas their flight needs to just be good enough to get them from point A to point B (where they often just crash-land and get backup).
June bugs always struggle on their back on concrete because in their evolutionary history, such flat surfaces are exceedingly rare—they could always count on some 3D structure to cling onto to flip back up (leaves, stems, uneven soil terrain), so they never needed to right themselves this way. Other than being a nuisance when they use your face as a landing strip, they are harmless—and in fact quite delicious, according. If you go to a park and find s**t of raccoons and coyotes, or owl pellets around this time of year, you can often see many fragments of beetle armor--those don't break down easily, but the insides are very nutrient-dense.
We hope you'll take some time this evening to appreciate the June Bugs on your porch!