If you're in Texas, Florida or other Southern states this summer,
watch out for "crazy ants," warns Edward LeBrun, a University of Texas
research associate who studies the species.
Also known to scientists as Nylanderia fulva,
they're called crazy because of their unpredictable movements and
swarming populations. The bug is reddish-brown, about an eighth of an
inch long and has a hankering for honey dew - with a side of
electronics. The insects nest anywhere and are easily transported, but
so far have mostly infested Texas and several Southern states after
being inadvertently transported from South America by humans.
spread to 21 counties in Texas, 20 in Florida and a few in Mississippi
and Louisiana, according to LeBrun's study, published in the journal Biological Invasions.
They cause about $146.5 million in electrical damage a year because
millions of ants are electrocuted in small circuits or wires, where they
seek warmth. They can also move soil, causing small structures or
slabs to tilt and electronics to shut down as moisture accumulates in
gaps, according to a Texas A&M University study published in April.
no permanent solution yet, and fending off the ants is costly because
of the need for repeated treatments. Without them, the ants would return
with a vengeance from untreated neighboring areas.
VIDEO: Crazy ants in leaves
and Paul Dans of Baytown, Texas, know all about that, having fought the
nuisance since 2011, when millions of crazy ants invaded their 3-acre
Struggling to keep the ants at bay using chemical sprays
every two weeks, Susan Dans says she "felt overwhelmed," fearing the
ants would cause more damage. It became difficult to walk or stand
outside - she couldn't even let her dogs out in the yard.
"It's just a frenzy," she says. "They're everywhere."
the couple saw a TV interview with Tom Rasberry, the Texas pest
terminator credited with identifying the vexatious beasts in 2002.
Rasberry says he has been able to ward them off and, on two occasions,
eliminate an entire colony with the insecticide Termidor (fipronil), a
poisonous gas. The chemical, initially used for termites, was approved
for emergency use only in Texas by the FDA. If used incorrectly, it can
be deadly for bees, birds and aquatic animals, including fish.
"We can kill them," he says. "But unless you can control the entire area, the best we can do is keep them at bay."
the invasion three years ago, the Dans still must get treatments every
three months, costing about $2,300 a year. Unable to afford protection
for all of their land, they settle for a 1-acre barrier surrounding
their home while they say the remaining 2 acres wastes away, decreasing
their property value.
"It's sad because you have no control," Susan Dans says. "You just don't see daylight."
study says the ants aren't just a costly nuisance because they're
displacing other aggressive species, such as fire ants - they're
throwing the whole Southern ecosystem out of whack.
"It's not a
good trade," says Robert Puckett, associate research scientist at Texas
A&M University, who has also examined the species in separate
studies. "Some people think they'd prefer to deal with crazy ants. But
once they invade, people want their fire ants back."
Ants don't have a nasty stinger like fire ants, they do bite. Crazy ant
mounds are also decentralized and can create larger super colonies. To
make matters worse, the insect's kryptonite has yet to be discovered -
typical insecticides have no effect.
In Colombia, they have
replaced all other ant species, killing small animals by asphyxiation.
They've attacked the eyes, noses and hooves of larger animals such as
cattle, and dried out entire grasslands.
LeBrun says the invasion is "very concerning" because scientists from both South and North America know little about the ant.
best thing to do, he says, is avoid transporting them by closely
monitoring belongings and take advantage of available treatments until
researchers can find better answers.
"We can really make a difference," he says. "But we need to be careful, and we need to know more."
Rasberry, however, isn't so optimistic.
"It's gone too far," he says. "There's no turning back."