Following is a transcript of the video. Narrator: At first glance, a fire ant hill — or mound, as it's properly called — looks impossibly small. And yet, a colony of up to 250,000 ants call it ...

Fire ants usually build their nests near damp areas underground and often go unnoticed unless they create a visible mound.

Hybrid fire ants, well established in East Tennessee and parts of Kentucky and North Carolina, are now infiltrating Southwest Virginia.