Fly Parts (image) Howard Hughes Medical Institute Share Print E-Mail Caption To mate successfully, the male (blue) and female (red) flies' reproductive parts need to fit together just right. New research shows that female flies can deem mating successful based on the feeling. Credit Igor Siwanowicz Usage Restrictions Must use with credit Share Print E-Mail 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.