Big Headed Ant (Super Colony Ants)
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The bigheaded ant (BHA)
The BHA, a soil-nesting ant, is sometimes confused with subterranean termites because it may create debris-covered foraging tubes that are somewhat similar, albeit much more fragile, than termite tubes. More often these ants leave piles of loose sandy soil. Homeowners are annoyed by these "dirt piles" and by ants foraging in bathrooms, kitchens, around doors, and windows, as well as on exterior paved or brick walkways or driveways. Control of the BHA is difficult because the ant colonies are numerous and populations usually extend across property lines.
The BHA can be found nesting in disturbed soils, lawns, flowerbeds, under objects, such as bricks, cement slabs, or flower pots, around trees or water pipes, along the base of structures, and walkways, where displaced soil is usually observed from the action of ants digging below the surface. Well-cared-for lawns may have BHA infestations that are less noticeable, except along the edges where lawns meet walkways where piles of soil are often deposited. BHA populations expand into neighboring areas by following along these lawn-walkway edges or roadways. Population movements into new areas to establish nests and subsequent displacement of other ant populations can be rapid (Hoffman 2006; Warner, unpublished observations).