Copulation (video) Tokyo Metropolitan University Share Print E-Mail Loading video... Caption Unstable copulation (right) due to mismatched genitalia in heterospecific mating between Drosophila suzukii and its sibling species. Stable copulation (left) between D. subpulchrella is shown for comparison. Credit Aya Takahashi Usage Restrictions None 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.