They march across sidewalks, appear in kitchens, and build sprawling colonies beneath gardens and neighborhoods. Ants are among the most familiar insects in San Diego County, yet scientists say these tiny creatures play a much larger role in the local environment than many people realize.

According to the University of California Statewide Integrated Pest Management Program (UC IPM), California is home to roughly 270 ant species, although only a small number are considered pests. In San Diego, one of the most common species is the Argentine ant, an invasive insect that has spread throughout Southern California and often enters homes in search of food and water.

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