Ant swarms in Houston destroying electronics

It's not enough just to kill the queen. Experts say each colony has multiple queens that have to be taken out.

At the same time, the ants aren't taking the bait usually left out in traps, according to exterminators, who want the Environmental Protection Agency to loosen restrictions on the use of more powerful pesticides.

And when you do kill these ants, the survivors turn it to their advantage: They pile up the dead, sometimes using them as a bridge to cross safely over surfaces treated with pesticide.