Remember this the next time customs is annoying you at the border…

DALLAS – In what sounds like a really low-budget horror film, voracious swarming ants that apparently arrived in Texas aboard a cargo ship are invading homes and yards across the Houston area, shorting out electrical boxes and messing up computers.

The hairy, reddish-brown creatures are known as “crazy rasberry ants” – crazy, because they wander erratically instead of marching in regimented lines, and “rasberry” after Tom Rasberry, an exterminator who did battle against them early on…

The newly recognized species is believed to have arrived in a cargo shipment through the port of Houston. Scientists are not sure exactly where the ants came from, but their cousins, commonly called crazy ants, are found in the Southeast and the Caribbean…

The good news? They eat fire ants, the stinging red terrors of Texas summers.

But the ants also like to suck the sweet juices from plants, feed on such beneficial insects as ladybugs, and eat the hatchlings of a small, endangered type of grouse known as the Attwater prairie chicken.

They also bite humans, though not with a stinger like fire ants.

Worse, they, like some other species of ants, are attracted to electrical equipment, for reasons that are not well understood by scientists.

They have ruined pumps at sewage pumping stations, fouled computers and at least one homeowner’s gas meter, and caused fire alarms to malfunction. They have been spotted at NASA’s Johnson Space Center and close to Hobby Airport, though they haven’t caused any major problems there yet.

Exterminators say calls from frustrated homeowners and businesses are increasing because the ants – which are starting to emerge by the billions with the onset of the warm, humid season – appear to be resistant to over-the-counter ant killers…

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…

But don’t worry the state government and the EPA are working to stop the ants… I’m sure they’ll do a much better job than they did with the fire ants moving in from Mexico.

• Ants swarm over Houston area, fouling electronics