
Odorous house ant
Tapinoma sessile
- Order & Family
- Hymenoptera, Formicidae
- Size
- 2.5-3.5 mm (workers)
Natural Habitat
Highly adaptable, found in a wide variety of habitats. Indoors, they nest in wall voids, under floors, around pipes, and near sources of moisture. Outdoors, they prefer shallow nests under rocks, logs, mulch, potted plants, and concrete slabs. They often seek shelter indoors during adverse weather conditions.
Diet & Feeding
Broadly omnivorous, primarily feeding on sugary substances like honeydew produced by aphids and other sap-feeding insects. They also consume other insects (dead or live), plant secretions, and human food scraps, especially sweets, meats, and grease.
Behavior Patterns
Odorous house ants are known for their fast, erratic movements and foraging in trails. They are highly adaptable and can establish nests in various locations both indoors and outdoors. When crushed, they emit a distinct rotten coconut-like odor, which is a key identifying characteristic. They are active throughout the year but are more noticeable during warmer months as they forage for food and water.
Risks & Benefits
Risks: Primarily a nuisance pest in homes and businesses. They do not sting or bite but can contaminate food and sterile environments. They are difficult to eradicate due to multiple queens and multiple nesting sites. Benefits: As part of the ecosystem, they can help in breaking down organic matter and controlling small insect populations, though their impact is minor.