Authorities are investigating how fire ants came to be at a rural subdivision but say it is likely they arrived in mulch, plants, turf or soil.

Most of the time, ants mind their own business in your backyard. They usually stay outdoors ... and only two types (fire ants and Asian needle ants) sting. Nevertheless, no one wants them as ...

Narrator: At first glance, a fire ant hill — or mound ... Practically overnight, meters upon meters of tunnels can pop up in your yard. And all you'll notice is a tiny mound.