Color: Black with reddish lines on its back

Legs: 6

Shape: Somewhat flat, elongate-oval

Size: ½ inch

Box Elder bugs get their names primarily because they are a major pest for Box Elder trees. They will also inhabit a variety of other trees and shrubs as well. Box Elder bugs are primarily a nuisance pest because they fly, congregating on the exterior of structures, sometimes in great numbers. They can also enter inside and hibernate in or around structures and homes.

Habits: Over-wintering adults emerge from hibernation in the spring flying from structures to trees and shrubs. The females lay eggs on leaves, shrubs, and trees in the spring. Eggs are straw-yellow colored and turn red as the embryos develop. Eggs hatch in about two weeks.

Threats: Box Elder bugs are primarily a nuisance pest. Large numbers can be present around structures in the spring and fall. They can enter inside structures through cracks, open doors or windows, attic spaces, window frames, door frames, light fixtures, and other ways as well. Fecal matter may cause a red stain, resulting in discoloration on curtains, drapes, clothing, and other resting places. They may occasionally bite causing skin irritation.