Hairy, crazy ants are on the move in the southeast.

The biting bugs have invaded by the millions in Louisiana, Mississippi, Texas and Florida.

They travel in cargo containers, hay bales, potted plants, motorcycles and moving vans. They can overwhelm beehives -- one Texas beekeeper was losing 100 a year in 2009. And they can short out industrial equipment.

Controlling them can cost thousands of dollars, and it can be tricky. A circle of poison may stop them for only a day before a fresh horde shows up.

The ants have been reported in 20 Florida counties, and another 18 in Texas. They've been found in only a few spots in Louisiana and Mississippi, and experts hope they can curb their spread in those states before it's too late.