Raspberry crazy ants are marching towards Houston in huge numbers. Their arrival is expected in Texas city in just a few weeks. These tiny ants have already caused trouble in more than 20 countries throughout the Lone Star State.

The threat posed by raspberry ants is much higher than fire ants for many reasons. First, raspberry ants are known to spread their colonies much quickly than the most common insect. People, who live in the areas where these ants exist, could be often seen shoveling the ants from their bathrooms and kitchens.

Texas was once dominated by fire ants. However, those stinging creatures are not even as threatening as the raspberry ant. The advancing insects have the ability to coat their body with a special chemical to stay protected even from the venom of fire ants, said advancing insects in a report.

Tom Raspberry, the exterminator, recognized the species for the first time in 2002. And the ants were named after him. The technical name of the raspberry ant is tawny crazy ants, or Nylanderia fulva.

Raspberry ants are known to live under rocks, in trees, and among grass in the wild. These ants are not similar to those who build hills, but they like to hide in mulch piles. These tiny creatures enter homes and cause damage to electronic devices.

Raspberry ants invaded the US from South America has provided the evidence of the latest migration attributable to encroachment on wild areas. Red imported fire ants began to arrive in the US in the 1930s. It immediately started to displace the two earlier species of insect.

"In infested areas, large numbers of tawny crazy ants have caused great annoyance to residents and businesses. In some situations, it has become uncomfortable for residents to enjoy time in their yards", said researchers at Texas on their website.