bugs are attracted to large trees with
dense, evergreen foliage like cedars, or trees
with deeply fissured bark. A single
large tree might attract hundreds, or thousands,
of boxelder bugs from the surrounding area.
These bugs are strong fliers so may travel miles
from the maple tree on which they developed.
If this tree, full
of thousands of bugs, is near the sunny,
southwest, side of a house bugs will move onto
the warm house during sunny days. Imagine, a
thousand, or more 1/2" bugs congregating on the
outside of your house, around doors, windows and
on siding. This actually happens to many people
each fall, year after year.
What to do.
First realize that these bugs are harmless.
They don't bite or sting, won't hurt your house
nor will they set up permanent residence. But,
see Boxelder Bug
Control on Houses for some suggestions for
getting rid of them.
Plant-based Botanical Insecticides