Bug Identifier
Ground Beetle
Community identification

Ground Beetle

Harpalus pennsylvanicus

Order & Family
Coleoptera: Carabidae
Size
13 to 22 mm (approx. 0.5 to 0.8 inches)
See this bug in the Encyclopedia

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.