`` They do n't sting like fire ants do , but aside from that they are much bigger pests , '' he said . ` ` Tawny crazy ants ' '' could change ecological conditions . Crazy ants likely to attract fire ants and ` ` ants '' them , researcher says . Species originated in South America . Crazy ants moved with humans to Brazil .
` ` Tawny crazy ants ' '' could change ecological conditions . Crazy ants likely to attract fire ants and ` ` ants '' them , researcher says . Species originated in South America . Crazy ants moved with humans to Brazil .