Tapinoma sessile is a species of ant commonly known as the odorous house ant. It is a small, brownish-black ant belonging to the family Formicidae. The name "sessile" refers to the ants' habit of not moving their abdomen when disturbed, unlike other ants that display defensive behavior by raising their abdomens or stingers.
These ants are primarily found in North America but have also been introduced to other regions of the world, including Europe and Asia. They are commonly seen in and around human-made structures such as homes, buildings, and gardens. They are particularly attracted to sweet and greasy food substances, often invading kitchen areas in search of such sources.
With their ability to form large colonies and establish satellite nests, Tapinoma sessile ants can become a nuisance, especially when they invade indoor spaces. They emit a distinct odor when crushed, which is often described as a "rotten coconut" smell, hence their common name, odorous house ant.
Tapinoma sessile plays a significant role in the ecosystem as decomposers, feeding on dead insects, carrion, and sugary substances. They also facilitate seed dispersal, aiding in the growth of various plant species. Despite their ecological importance, they are mostly considered as nuisance pests due to their ability to contaminate food and their persistent presence in human dwellings.
Controlling Tapinoma sessile infestations typically involves eliminating potential food sources, sealing off entry points, and, in severe cases, professional pest management intervention.
