Boxelder bugs are found clustering all over homes in Minnesota in the fall and spring

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Facts about Boxelder Bugs

Boxelder bugs are native to the United States and Canada

Boxelder bugs are not harmful. They won’t harm plants, trees, or people

Boxelder bugs are attracted to female boxelder, maple, and ash trees that produce helicopter seeds.

They feed almost entirely on helicopter seeds

They lay their eggs on the trunk, branches, and leaves of boxelder, maple, and ash trees

They mate and lay eggs in the spring and summer

Young boxelder bugs are redder and can’t fly

Boxelder bugs reproduce more during hot and dry summers

In the fall they fly toward buildings and homes to overwinter inside

They are attracted to the south-facing walls of homes and buildings to stay warm during the colder fall days.

Boxelder bugs that are inside homes in the winter do not breed or lay eggs

Most boxelder bugs that get inside stay dormant all winter.

They become active in the winter during sunnier days that heat the windows, walls, and roof

Click the link to the UMN Extension to learn more