Ground Beetle
Scientific Name: Harpalus pennsylvanicus
Order & Family: Coleoptera: Carabidae
Size: 13 to 22 mm (approx. 0.5 to 0.8 inches)

Natural Habitat
Fields, gardens, and residential areas; often found under rocks, logs, or leaf litter.
Diet & Feeding
Opportunistic omnivores; they eat seeds (especially weed seeds) and small insects like caterpillars and aphids.
Behavior Patterns
Primarily nocturnal hunters that are highly active on the ground. They are frequently attracted to porch lights at night and may accidentally enter homes. They undergo complete metamorphosis.
Risks & Benefits
Generally beneficial to the ecosystem and gardens as they consume weed seeds and pest insects. They are harmless to humans, though they can release a foul-smelling odor if handled or emit a small pinch if provoked.
Identified on: 6/20/2026