Boxelder Bug

Typically found on or near boxelder, maple, and ash trees; often moves to buildings for winter shelter.

Herbivorous, primarily feeding on the seeds, flowers, and leaves of host trees (especially female boxelder trees).

They are gregarious, often congregating in large groups on sun-facing walls. They undergo incomplete metamorphosis (egg, nymph, adult).

Generally harmless to humans and trees; they are considered nuisance pests when they enter homes to overwinter. They do not bite or sting but can stain fabrics with excrement if crushed.