Yellow crazy ants are a declared pest species. They get their common name from their frantic erratic movement when disturbed. Crazy ants do not bite but spray formic acid to subdue prey, this can irritate skin and eyes of people coming in contact with the ants. They have a slender yellow to brown body with a dark brown abdomen. The abdomen is sometimes dark brown with lighter brown bands. The legs and antennae are very long in proportion to the body.