Mound of fine-grained soil near entrance to Western sidewalk ant colony.
Western sidewalk ants aren’t really troublesome and, unless they decide to enter your house, may be ignored. However, if ants take up residence beneath your patio, their soil excavation may cause your patio or pavers to sink over time. Subsidence causes more cracks, more “doorways” for ants, and more places for weeds to sprout. To control Western sidewalk ants, contact a pest control professional.