June Beetle

A bumbling porch light visitor

True June beetles (genus Phyllophaga) emerge from soil in late spring and early summer — typically June in temperate North America, hence the name. They’re large, stocky, brown, and strongly attracted to artificial light — a behavior called positive phototaxis. They blunder into porch lights, screen doors, and lit windows by the hundreds on warm humid evenings.

Their flight is heavy and erratic, with a loud buzzing sound. They frequently bump into walls, fall on their backs, and struggle to right themselves. The clumsy nighttime arrival is a characteristic warm-weather sound across much of North America.

The grub problem

The real damage is done by the white C-shaped grubs — June beetle larvae that live in soil and feed on grass and plant roots. A heavy grub population can:

• Kill large patches of lawn (the dead grass pulls up like a carpet because the roots are gone).
• Damage corn, soybean, and other field crop roots.
• Attract skunks and raccoons that dig the lawn apart looking for grubs.

The larval stage lasts 2–3 years for most Phyllophaga species — meaning grub populations can build up if turf isn’t managed.

Different “June beetles”

Several distinct species are called June beetles or June bugs in North America:

• True June beetles (Phyllophaga spp.) — about 200 species, brown, nocturnal.
• Green June beetle (Cotinis nitida) — bright metallic green, day-flying, eats ripe fruit.
• Japanese beetle (Popillia japonica) — invasive, similar appearance, severely damages gardens and crops.
• May beetle (alternate name in some regions for true June beetles emerging earlier).

The unifying features: scarab beetle family, soil-dwelling grubs, late-spring/early-summer adult emergence.

Cultural appearance

June bugs feature in countless American Southern stories, songs, and childhood memories — Bo Diddley’s “Diddy Wah Diddy” mentions them, Eudora Welty wrote about them, and “tying a June bug to a string and flying it” was a real (if cruel) Depression-era kids’ pastime.