09/17/2026
Seeing Juvenille Box Elder Bugs Everywhere Right Now?? đľâđŤ
If youâve noticed swarms of black-and-red bugs on sunny walls, windows, or the trunks of trees, youâre seeing classic fall box elder bug behavior.
These bugs spend the summer feeding on seeds from female box elder trees (and sometimes other maples or ash). When temperatures drop in September, they gather on the warm south and west sides of trees and buildings, looking for a place to overwinterâoften your home.
Quick fun facts:
⢠Theyâre about ½ inch long with three red stripes behind the head.
⢠They donât bite, sting, or spread disease.
⢠Their droppings can leave reddish stains.
⢠Nymphs start out bright red before turning black and red as adults.
Seeing heavy activity near box elder trees or on your house? We can help control them now, and reduce the invasion before they settle in for winter. Give us a call today to get your house treated for these pesky bugs, and the bugs yet to come! 920.826.6233 is our office number, or shoot us a Facebook message!
(Photo creds to one of our amazing techs!)