Black Garden Ant

Scientific Name: Lasius niger

Order & Family: Order Hymenoptera, Family Formicidae

Size: Workers typically range from 3mm to 5mm; queens can reach up to 9mm.

Black Garden Ant

Natural Habitat

Found widely across North America and Eurasia; commonly nests in soil, under stones, or in the foundations and walls of buildings.

Diet & Feeding

Omnivorous; they feed on nectar, seeds, and small insects. They are well known for 'farming' aphids for their sugary honeydew secretions.

Behavior Patterns

Highly social insects living in complex colonies. They are known for foraging along established chemical trails and being active during the day. Mating flights ('flying ant day') usually occur in mid to late summer.

Risks & Benefits

Generally harmless to humans as they do not sting or transmit disease, though they can be a nuisance when infesting homes. Benefits include soil aeration and acting as a natural food source for various birds and spiders.

Identified on: 4/2/2026