1 not for sex (IMAGE) Smithsonian Tropical Research Institute Caption Why do matador bugs have these flag like structures on their hind legs? Credit Ana Endara, Smithsonian Tropical Research Institute Usage Restrictions Credit: Smithsonian Tropical Research Institute License Original content 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.