Crazy Ant (Nylanderia fulva) Queen Head (image) University of Texas at Austin Caption In 2012 the species was formally identified asNylanderia fulva, which is native to northern Argentina and southern Brazil. Frequently referred to as Rasberry crazy ants, these ants recently have been given the official common name "Tawny crazy ants." Credit Image courtesy of Joe MacGown, Mississippi Entomological Museum Usage Restrictions Credit Joe MacGown, Mississippi Entomological Museum Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.