The exotic invasive pest ant species “tawny crazy ant” ( Nylanderia fulva) was found in Texas in 2002 but is now in at least five states–including Florida, Louisiana, and Georgia. While these ants don’t bite like fire ants, the nature of their small bite is eclipsed by their ability to overwhelm an area and their resistance to chemical control. In their native South America, they have even caused deaths to chickens by asphyxiating by their sheer numbers as they congregate on moist openings such as nares and eyes.
Fire ants pose a problem if their mounds are stepped on because they bite. But crazy ant invasions can move into homes, electronics, and can overwhelm with huge populations. They can be seen foraging erratically, hence the name: crazy ants.
According to the extension service at Texas A & M the masses of ants displace more than other ants; nesting song birds and small animals lose access to habitat. Scientists know very little about the impact to wildlife from the tawny crazy ants in the United States. Control methods are still being studied.