Horse hairworm and mantis (IMAGE) RIKEN Caption Chordodes horse hairworms use mantids as definitive hosts. After maturing in the mantids, they manipulate their hosts to enter water bodies where the parasites reproduce. Credit Takuya Sato Usage Restrictions None 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.