Ground Beetle
Scientific Name: Harpalus affinis
Order & Family: Order: Coleoptera; Family: Carabidae
Size: 10 to 12 mm

Natural Habitat
Commonly found in gardens, fields, and lawns under stones, logs, leaf litter, or debris. Often enters homes accidentally through cracks.
Diet & Feeding
Omnivorous; primarily feeds on seeds (granivore) but also consumes small invertebrates like aphids and slugs.
Behavior Patterns
Mainly nocturnal and very active runners. They are attracted to lights at night and go through complete metamorphosis (egg, larva, pupa, adult).
Risks & Benefits
Harmless to humans, though they may emit a foul-smelling substance if handled. They are beneficial to the ecosystem as they help control pest populations and consume weed seeds.
Identified on: 5/12/2026