The beetles may pinch you, and cause a malodorous smell, but they
are not a medical threat to humans, they are not toxic. They are
actually beneficial, as they eat other insects.
"Ground beetles are occasionally a nuisance indoors by their presence.
Homeowners may confuse these beetles for cockroaches, carpet beetles,
woodboring beetles or some other household structural pest. Others are
simply curious about these insects after finding them outdoors under
stones, logs, boards and similar places. Some beetles are attracted to
lights and enter the home by crawling through small openings and
cracks in windows, doors, foundations, etc. Ground beetles normally
live outdoors and do not establish themselves indoors. They are not
dangerous to humans, domestic animals (pets), structures or household
items. If handled, some large beetles will pinch fingers with their
strong mandibles (jaws) and emit noxious defensive odors."
"Pest Status: Species in this highly variable group of beetles are
predominantly predators of other arthropods, both as adults and
larvae; occasionally become a nuisance when they occur locally in high
numbers; although capable of biting, they are generally not medically
Management: None, this is considered a beneficial insect. "
"Common Black Ground Beetles are, for the most part, helpful to
people. They eat a lot of pests, such as aphids and slugs. However
they sometimes eat helpful animals too, such as earthworms and other
beetles. Since these beetles were introduced from Europe, and are not
native to the United States, scientists are still studying them to see
what kind of impact they have on the environment."
"Longhorned beetles are unique and fascinating insects, and they pose
no threat to humans or wood in the home."
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ground beetles + bite